QUARTERLY JOURNAI,

q,,

Vol . L X X V I I . N o . 3 0 5 . P A R T I.

T H E

QUARTERLY JOURNAI,

O F T H E

GEOLOGICAL SOCIETY.

E D I T E D B Y

~E PERMANENT SECRETARY.

[With Two Plates, illustrating Papers by Mr. H. Bolton and Mr. D. Davies.]

:M:xY 13th, 1921.

LONDON :

LONGMANS, GREEN, AND CO.

PARIB:--CHARLES KLINCKBIECK, II RUE DE LILLE.

SOLD ALBO AT THE APART~IENTS OF THE SOCIETY.

Price Seven Shilli~g~ and Six pe~we.

LIST OF T i l E OFFICERS AND C O U N C I L OF T H E

GE()I OGICAI . SOCIETY OF LONDON. Elected February iSth, 1921.

Richard Dixon Oldham, F.R.S.

i ~ i c t : ~ t ' t ~ i ~ t n t ~ . Prof. Edmund Johnston GarwooJ, M.A., Col. Hsnry George Lyons, D.So., F.R.S.

Sc.D.,F.R.S. George Thurland Prior, M.A., D.Se., George William L:~'.nplugh, F.R.S. : F.R.S.

~irtrttarit~. Herbert Henry Thomas, bI.A., Sc.D. Walter C~mpbell Smith, M.0., 3LA.

~'ortigll bttrttarl2. • rta~urtr. SirArehibald Geikie, O.M., K.C.B.0 D.C.L., Robert Stansfield Herries, M.A.

LL.D., Se.D., F.R.S. i

Francis Arthur Bather, M.A., D.Sc., F.R.S. William Bernard Robinson King, O.B.E., Prof. William S. Boulton, D.Se., Assoc. M.A.

R.C.Sc. George William Lamplugh, F'.R.S. Thomas Crosbee Cantrill, B.Se. i Col. Henry George Lyons, D.Se., F.R.S. James Archibald Douglas, M.A., B.Se. LL-Col. Sir Arthur Henry MeMahon, James Vincent Elsden, D.Se. i K.C.I.E.. C.S.I.. G.C.V.O.

I

John Smith Flett, O.B.E., M.A., LL D., Richard Dixon Oldham, F.R.S. D.Sc., M.B., F.R.S. George Thurlan:l Prior, M.~-., D.Sc.,

Prof. Edmancl Johnston Garwoo.1, .~I.A..': F.[¢.S. Sc.D., F.I¢.S, Pcof. Sidney Hugh Reynolds, M.A., Sc.D.

Sir Arehibalcl Geikie, O.~I., K.C.B.,D.C.L., Walter Campbell Smith, 5f.C., M.A. LL.D., Sc.D.. F.R.S. Sir Aubrey Strahun, K.B.E., Sc.D., LL.D.,

John Frederick Norman Green, B.A. F.[~.S. Robert Stansfield Herries, M.A. Herbert Henry Thomas, M.A., Se.D. Prof. Owen Thomas Jones, M.A., D.Sc. i Prof. William Whitehead Watts , M.A., Prof. Percy Fry Kendall, l~ff.Sc. I Sc.D., LL.D., F.t~.S.

_ _

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¢.ibrarian. ~'ltrk. Arthur Greig. M. St. John Hope.

STANDI2qOr P U B L I C A T I O N C O M M I T T E E . Mr. R. D. 01dham, Preside~zt.

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Prof. W. S. Boulton. l~lr. J. F. N. Green. Prof. S. H. Reynolds. Mr. J. A. Douglas. Prof. P. F. Kendall. Prof. A. C. Seward. Dr. J. V. Elsden. Mr. G. V¢. I~amplu~h. Sir Aubrey Strahan. Dr. J. S. Flett. Col. H. G. Lyons. Prof. W. W. Watts . :Prof. E. J. Garwood. Dr. G. T. Prior.

O R D I N A R Y M E E T I N G S O F T H E G E O L O G I C A L S O C I E T Y TO BE H E L D AT BURLINGTON" HOUSE.

SESSION 1 920- -1921 .

1921. Wednesday, May . . . . . . . . . . . . . . . . . . . . . . . . . . 25*

June . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - -22 # [Business wilt commence at 5.30 p.m. precisely.~

The asterisks denote the dates on which the Council will meet.

A D M I S S I O N A N D P R I V I L E G E S

OF

F E L L O W S OF T H E GEOLOGICAL SOCIETY OF LONDON.

E VERY Candidate for admission as a Fellow must be proposed by three or more Fellows, wlm must sign a Certificate in his favour. The Proposer whose name stands first upon the Certificate must have a personal knowledge of the Candidate.

Fellows on election pay an Admission Fee of Six Guineas. The Annual Contribu- tion paid by Fellows is Three Guineas, due on the 1st of January in every year, and payable in advance ; but Fellows elected in November or December pay no Contribu- tion for the current year. The Annual Contribution may, at any time, be compounded for by a payment of Fifty-two Pounds Ten Shillings.

The Fellows are entitled to purchase all publications of the Society at a sub- stantial reduction on the price charged to the general public. Certain of these publications are distributed gratuitously, as issued by the Society.

The Library is open on Week Days to the Fellows between the hours of 10 and 5 (except on Saturdays, when the hours are from 10. to 1 , and except during the fortnight commencing on the first Monday in September, see also next page). Under certain restrictions, Fellows are allowed to borrow books from the Library.

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T H E H I S T O R Y O F T H E G E O L O G I C A L S O C I E T Y O F L O N D O N , by H. B. WOODWARD, F.R.S. Price 3c. net. [Postage Is.]

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T H E G E O L O G Y O F N E W ZEALAi~ID. Translated by Dr. C. F. FISCHER from the works of MM. HOCHSTETTER & PETERM&NNo Wit~l an Atlas of Six Maps. Price 10s. net. [Postage 9d.]

CONTENTS.

Pages Proceedings of the Geological Society, Session 1920-21, including the

Proceedings at the Annual General Meeting, the President's Anniversary Address, etc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i-xcii

PAPERS 'READ. Page

1. ]~Ir. R. D. Oldham on a Seasonal Variation in the Frequency of Earth- quakes (Second Communication) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Miss 1~I. E. J. Chandler on the Arctic Flora of the Cam Valley at Barnwell, Cambridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3. Mr. It. Belfort on ArchimyZacris TringZei, sp. nov. (Plate I) . . . . . . . . . . . . . . . . . . 23

4. Mr. D. Davies on the Ecology of the Westphalian and the Lower Part of the Staffordian Series of Clydach vale and Gilfach Goch (Plate II) ... 30

[The Editor of the Quarterly Journal is directed to make it known t o the Public that t h e A u t h o r s a l o n e a r e r e s p o n s i b l e f o r t h e f a c t s a n d o p i n i o n s c o n t a i n e d in t h e i r r e s p e c t i v e P a p e r s . ]

### The Council request that all communications intended for publication by the Society shall be clearly and legibly written on one side of the paper only, w i t h p r o p e r r e f e r e n c e s , a n d in a l l r e s p e c t s in f i t c o n d i t i o n f o r b e i n g a t o n c e p l a c e d in t h e P r i n t e r ' s h a n d s . Unles~ this is done, it will be in the discretion of the Officers to return the communication to the Author for revision.

The Library a t the Apartments of the Society is open every Week Day from Ten o'clock until Five, except on Saturdays (when the hours are from 10 to 1), and except during the fortnight commencing on the first Monday in September, when the Library is closed for the purpose of cleaning.

Fellows are reminded that they are not entitled to receive the Quarterly Journal regularly, unless a subscription at the rate of 10s. per volume is paid in advance. Those Fellows who do not require the complete series can obtain separate parts at the price ef 3s. each, if applied for within one year of the date of issue.

Vol . L X X V I I . P/~RT 2.

No. 3 0 6 .

THE

QUARTERLY JOURNAL

OF THE

GEOLOGICAL SOCIETY.

EDITED BY

THE PERMANENT SECRETARY

[With One Plate, illustrating Mr. W. B. R. King's Paper.]

AUGVS~: 19th, 1921.

LONDON :

LONGMA.NS, GREEN, AND CO.

P A R I S : - - C H A R L E S K L I N C K S I E C K , 1[ R U E D E L I L L E .

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Price Seven Shillings and Sixpence.

L I S [ ~ O F T I I E OFFICERS AND COUNCIL OF THE

GE()LOGICAL S{)CIETY OF LONDON. Elected A'J;u~r~, 1921.

~lSrt~i~tnt. Richard Dixon Oldham, F.R.S.

~ict--~rr~i~tnt~. Prof. Edmund Johnston Garwood, ~.A., Col. Henry George Lyons, D.So., F.R.S.

Sc.D.,F.R.S. George Thurland Prior, l~I.A., D.Se., George William Lamplugh, F.R.S. F.R.S.

~tcrttar~t~. Herbert Henry Thomas-, M.A, Se.D. I Walter Campbell Smith, M.C., M.A.

~oreign ~ttretarp. g rta~urer. SirArchibald Geikie, O.M., K.C.B., D.C.L., / Robert Stansiield Herries, M.A.

LL.D., Sc.D, F.R.S. J

Francis Arthur Bather, M.A., D.Sc., F.R.S.! William Bernard Robinson King, O.B.E., Prof. William S. Boulton, D.Sc., Assoc.

R.C.Sc. Thomas Crosbee Cantrill, B.Sc. James Archibald Douglas, M.A., B.Se. James Vincent Elsden, D.Se. John Smith Flett, O.B.E., ~¢I.A., LLD. ,

D.Sc., M.B., F.R.S. Prof. Edmund Johnston Garwood, M.A.,

Se.D., F.R.S, Sir Archibald Geikle, O.M., K.C.B., D.C.L.,

LL.D., Sc.D.. F.I~.S. John Frederick Norman Green, B.A. Robert Stansfield Herries, I~I.A. Prof. Owen Thomas Jones, M.A., D.Sc. Prof. Percy Fry Kendall, M.Se.

M.A. George William Lamplugh, F.R.S. Col. Henry George Lyons, D.Sc., F.R.S. Lt.-Col. Sir Arthur Henry McMahon,

K.C.I.E., C.S.I., G.C.V.O. Richard Dixon Oldham, F.R.S. George Thurland Prior, M.A., D.Sc.,

F.I~.S. Prof. Sidney Hugh Reynolds, M.A., So.D. Walter Campbell Smith, M.C., M.A. Sir Aubrey Strahan, K.B.E., Sc.D., LL.D.,

F.R.S. Herbert Henry Thomas, M.A., Sc.D. Prof. William Whitehead Watts , M.A.,

Sc.D., LL.D., F.R.S.

~ t r m a n e n t ~ t t r t t a l ' ~ . L. L. Belinfante, M.Sc.

~ibrat'ian. ¢~Itrk. Arthur Greig. M. St. John Hope.

STANDING 'PUBLICATION COMMITTEF.

Mr. R. D. Oldham, President. Mr. W. Campbell Smith. Dr. Herbert H. Thomas. j Secretaries. Mr. R. S. Herries, Treasurer.

Prof. W. S. Boulton. Mr. J. F. N. Green. Prof. S. H. l~eynolds. Mr. J. A. Douglas. Prof. P. F. Kendall. Prof. A. C. Seward. Dr. J. V. Elsden. Mr. G. W. Lamplugh. Sir Aubrey Strahan. Dr. J. S. Flett. Col. H. G. Lyons. Prof. W. W. Watts . Prof. E. J. Garwood. Dr. G. T. Prior.

O R D I N A R Y M E E T I N G S OF T H E GEOLOGICAL SOCIETY TO BE HELD AT BURLINGTON HOUSE.

SESSION 1921--1922. 1921.

Wednesday, November . . . . . . . . . . . . . . . . . . . . . 9v--23 ,, December . . . . . . . . . . . . . . . . . . . . . 7 - -21*

1922. Wednesday, January . . . . . . . . . . . . . . . . . . . . . . . . 4"- -18 *

,, February (Anniversary Meeting, Friday, February 17th) . 1 " p 2 2 ~

,, March . . . . . . . . . . . . . . . . . . . . . . . . 8 --22 ~ ,, April . . . . . . . . . . . . . . . . . . . . . . . . . . 12 ,, May . . . . . . . . . . : ..... :: . . . . . . . . . 10"-- 24

June . . . . . . . . . . . . . . . . . . . : . . . . . . . 14"--28 [Business wi~ commence at 5.30 19.m. precisely.]

The asterisks denote the dates on which the Council will meet:

JAMES SWIFT & SON LT,, Makers of the highest grade MICROSCOPES and ACCESSORIES

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UNIVERSITY OPTICAL WORKS, 81 Tottenham Court Road, London, W . I .

Publ ica t ions to be h a d of the Geological Socie ty , B u r l i n g t o n House.

Q U A R T E R L Y J O U R N A L (Vols. III to LXXVI, inclusive). Price to Fellows, .~1 0s. 0d. each : .£1 5s. 0d. in cloth. [Postage ls.J ~eparate parts (2, 5, 7, 9, 55, & 273 are out of print) 7s. 6d. each : price to Fellows 5s. EPostage 5d.J

G E N E R A L I N D E X TO T H E F I R S T F I F T Y V O L U M E S O F T H E Q U A R T E R L Y J O U R N A L (1845-1894). Part I (A-La). Part II (La-Z). Price 7s. 6d. each. To Fellows 5s. each. [Postage 6d. each.]


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T H E G E O L O G Y O F N E W Z E A L A N D . Translated by Dr. C. F. FISCHER from the works of 1~I1~I. HOCHSTETTER & PETERMANN. With an Atlas of ~ix Maps. Price 10s. net. [Postage 9d.J

CONTENTS.

Page s Proceedings of the Geological Society, Session 1920-21 . . . . . . . . . . . . . . . . . . . . . . . . xciii-cl

PAPERS READ. Page

5. Mr. C. E. Tilley on the Granite-Gneisses of Southern Eyre Peninsula and their Associated Amphibolites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6. Mr. W. B. R. King on the Surface of the Marls of the l~Iiddle Chalk in the Somme Valley, etc., and the Effect on the Hydrology (Plate IH) . . . . . . . . . 135

7. Prof. O. T. Jones on the Valentian Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

[The Editor of the Quarterly Journal is directed to make it known to the Public that t h e A u t h o r s a l o n e a r e r e s p o n s i b l e f o r t h e f a c t s a n d o p i n i o n s c o n t a i n e d in t h e i r r e s p e c t i v e P a p e r s . ]

*** The Council request that all communications intended for publication by the Society shall be clearly and legibly written on one side of the paper only, w i t h p r o p e r r e f e r e n c e s , a n d in a l l r e s p e c t s in f i t c o n d i t i o n f o r b e i n g at o n c e p l a c e d in t h e P r i n t e r ' s h a n d s . Unless this is done, it will be in the discretion of the Officers to return the communication to the Author for revision.

The Library at the Apartments of the Society is open every Week Day from Ten o'clock until Five, except on Saturdays (when the hours are from 10 to 1), and except d u r i n g t h e f o r t n i g h t c o m m e n c i n g on t h e f i r s t M o n d a y in S e p t e m b e r , w h e n t h e L i b r a r y is c l o s e d f o r t h e p u r p o s e o f

c l e a n i n g .

Fellows are reminded that they are not entitled to receive the Quarterly Journal regularly, unless a subscription at the rate of 10s. per volume is paid in advance. Those Fellows who do not require the complete series can obtain separate parts at the price of 3s. each, if applied for within o~e year of the date of issue.

Vol. LXXV~ r. N o . 3 0 7 . P A R T 3 .

T H E

QUARTE RLY JOURN AL

OF THE

GEOLOGICAL SOCIETY.

EDITED BY

THE PERMANENT SECRETARY.

[With Seventeen Plates, illustrating Papers by the late C. Reid & Mr. J. Groves, Prof. W. J. Sollas, Profi S. H. Reynolds, and Mr. J. A. Douglas.]

NOVEMBER llth, 1921.

LONDON :


PARIS: - -CHARLE8 KIANCKBIECK. 11 RUE DE LILLE.

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Price Seven Shillings and Sixpence.

LIST OF THE OFFICERS AND COUNCIL OF THE

GE()LOGICAL SOCIETY OF LONDON. Elected February 18th, 1921.

Brt, i~,nt. Richard Dixon Oldham, F.R.S.

~Ffft~Ort,i~tnt~. Prof. Edmund Johnston Garwood, M.A., Col. Henry George Lyons, D.Sc., F.R.S.

Sc.D.,F.R.S. George Thurland Prior, M.A., D.Sc., George William Lamplugh, F.R.S. F.R.S.

~tr~tari,~. Herbert Henry Thomas, M.A., Sc.D. t Walter Campbell Smith, M.C., 1VI.A.

~[For~i~n bztr~tarp. ~r~a~ur~r. SirArohibald Geikie, O.M., K.O.B., D.C.L., I Robert Stansfield Herries, M.A.

LL.D., Sc.D., F.R.S. J

Francis Arthur Bather, M.A., D.Se., F.R.S. William Bernard Robinson King, O.B.E., Prof. William S. Boulton, D.Sc., Assoc.

R.C.Sc. Thomas Crosbee Cantrill, B.Sc. James Archibald Douglas, 1VI.A., B.Sc. James Vincent Elsden, D.Sc. John Smith Flett , O.B.E., ~¢I.A., LL.D.:

D.Sc., M.B., F.R.S. Prof. Edmund Johnston Garwood, M.A.,

Sc.D., F.R.S, Sir Archibald Geikie, O.M., K.C.B., D.C.L.,

LL.D., Sc.D.. F.R.S. John Frederick Norman Green, B.A. Robert St~nsfield Herries, ]~I.A. Prof. Owen Thomas Jones, M.A., D.Sc. Prof. Percy Fry Kendall, M.Sc.

M.A. George William Lamplugh, F.R.S. Col. Henry George Lyons, D.Sc., F.R.S. Lt.-Col. Sir Arthur Henry McMahon,


F.R.S. Prof. Sidney Hugh Reynolds, iYLA., Sc.D. Walter Campbell Smith, ~¢I.C., I~I.A. Sir Aubrey Strahan, K.B.E., Sc.D., LL.D.,

F.R.S. Herbert Henry Thomas, iYI.A., Sc.D. Prof. William Whitehead Wat ts , M.A.,


~ r c m a n t n t ~ t t r t t a ~ ' p . L. L. Belinfante, 1VLSc.

ILibrarian. gl~rtt. Arthur Greig. M. St. John Hope.

STANDING PUBLICATION COMMITTEE. Mr. R. D. 0ldham, President.

Mr. W. Campbell Smith. Dr. Herbert H. Thomas. j" Secretaries. Mr. R. S. Herries, Treasurer.

Prof. W. S. Boulton. Mr. J. F. N. Green. Prof. S. H. Reynolds. Mr. J. A. Douglas. Prof. P. F. Kendall. Prof. A. C. Seward. Dr. J. V. Elsden. Mr. G. W. Lamplugh. Sir Aubrey Strahan. Dr. J. S. Flett . Col. H. G. Lyons. Prof. W. W. Watts . Prof. E. J. Garwood. Dr. G. T. Prior.

O R D I N A R Y M E E T I N G S O F T H E G E O L O G I C A L S O C I E T Y TO BE H E L D AT BURLINGTON HOUSE.

SESSlO~ 1921-1922. 1921.

Wednesday, November . . . . . . . . . . . . . . . . . . . . . 23 ,, December . . . . . . . . . . . . . . . . . . . . . 7 - -21 #

1922. Wednesday, January .. . . . . . . . . . . . . . . . . . . . . . . . 4~--18 #

,, February (Anniversary Meeting, Friday, February 17th) . 1"- -22*

,, March . . . . . . . . . . . . . . . . . . . . . . . . 8 - -22 v ,, April . . . . . . . . . . . . . . . . . . . . . . . . . . 12 ,, May . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ~ - 24 ,, June . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 , - -28

[Business wi~ commence at 5.30 p.m. preciady.] The asterisks denote the dates on which the Council will meet.

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T H E G E O L O G Y Ol~ N E W Z E A L A N D . Translated by Dr. C. F. FISCHER from the works of I~IM. HOCHSTETTER & PF, TERMANN° W~]I an Atlas of Six Maps. Price lOs. net. [Postage 9d.]

CONTENTS.

PAPERS READ. Page

8. The late C. Reid & Mr. J. Groves on the Charophyta of the Louver Headon Beds of Hordle Cliffs (Plates IV-VI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

9. Prof. W. J. Sollas on Saccammina carteri Brady, and the Structure of the Foraminiferal Shell (Plate VII) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~. .... 193

10. Prof. S. H. Reynolds on the Lithological Succession of the Carboniferous Limestone (Avonian) of the Avon Section at Clifton (Plates VIII-XIV). 213

11. l~Ir. J. A. Douglas on Geological Sections through the Andes of Peru and Bolivia: I II--From the Port of Callao to the River Perene (Plates XV-XX) ......... ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

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P~T 4.

T H E

QUARTERLY JOURNAL

OF THE

GEOLOGICAL SOCIETY.

EDITED BY

THE PERMANENT SECRETARY.

[With Two Plates, illustrating Papers by Dr. A. B. Walkom and Miss A. I. McDonald & Dr. A. E. Trueman.]

DECEMBER ~ l s ~ , 1 9 2 1 .

tS

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CONTENTS.

PAPERS READ. Page

12. Mr. H. Hamshaw Thomas on an Ottokaria-like Plant from South Africa... 285

13. Dr. A. B. Walkom on :hr~emmu~osperm~m bowenense, gen. et sp. nov. (Plate XXI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289

14. Miss A. I. McDonald & Dr. A. E. Trueman on the Evolution of certain Liassic Gastropods, with special reference to their Use in Stratigraphy. 297

[TITLE-PAGE, CONTENTS, and INDEX tO Vol. LXXVII.]

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