; GEOLOGICAL MAGAZINE 
Monthly Journal of Geologn. 
WITH WHICH IS INCORPORATED 
SDA So 09 SO aed © 8 SS Ja ey OS IS a 
EDITED BY 
HENRY WOODWARD, LL.D... F.-R.S., &C. 
F.G.S., 
ASSISTED BY 
PROFESSOR J. W. GREGORY, D.Sc., F.R.S., F.G.S. 
Dr. GEORGE J. HINDE, FR.S., F.G.S. 
os THOMAS H. HOLLAND, K.C.1 E., A.R-C.S., D.Sc., F.R.S., F.G.S. 
DR. JOHN EDWARD MARR, M.A., Sc.D. (CAms.), F.R.S., F.G.S. 
DR. J. J. H. THALL, M.A., Sc.D. (Camp.), LL.D, F. = 8. F.G.S, 
PROFESSOR W. W. WATTS, Sc.D., M.Sc., F.R.S., VicE- Py tan? 
+ Dr. ARTHUR. SMITH WOODWARD, F.RB.S., F.L.S., raat lasting 
ws %) 
MAY, 1916. 
( OCT 211916 
CONTENTS 4 
I. ORIGINAL ARTICLES. 
The Petrography of Arran. By 
G. W. TYRRELL, A.R.C.Sc., 
F.G.S., University of Glasgow... 
A New Variety of Ammonite from the 
_ Lower Lias, Dorset. By Wyatt 
WINGRAVE, M.D. (Plate VIII.) 
The Crystalline Rocks of the 
Piémontese Alps. By C. 8. Du 
RICHE PRELLER, M.A., Ph.D., 
pa Ed By. Byes ck GS. ae a 
Sketch- _map. sae 
_ Tridymite and Quartz i in Icelandic 
Rocks. By LEONARD HAWKES, 
B.Sc. oe IX and 2 Text 
figures.) 
Further Notes « on the Land of Deep 
Corrosions. By F. KInGDOoN 
WARD, B.A., F.R.G.S. 
II, NovicEs oF Memorrs. 
By 
Wriesian Water in Manitoba. 
J. B. Tyrrell en os 
Ill. ae 
Dr. A. Strahan: The Coals of 
South Wales in reference to 
Anthracite. (With a Page-map.) 
The Mineral Resources of Great 
Britain .. 
The faeeres Pakconaic. pBlocaile ae 
Burma. 
Page 
193 
196 
198 
205 
. 209 
. 219 
. 225 
LONDON: DUBAU &CO., Lrp., 
REVIEWS 
-C. and E. M. Reid : 
Floras of the Dutch Baler: 
Geology of Western Australia 
Professor Bonney: On certain 
Channels teas Dee Se 
Geology of Copper Mountain, 
Kasaan .. 
Tertiary Mollusea, New Zealand .. 
The Composition of Echinoids 
Brief Notices: East Lothian — 
Victorian Trilobites and Hqw- 
setites — Oil and Gas Fields, 
Ontario—Coal Fields of Canada 
—The Petrographic Microscope 
—The Geological Protractor — 
Metals in Igneous Rocks—Pres- 
sure on Rocks and Minerals 
Gbloinat aM user 
. 227 
. 228 — 
. 229 
. 230 
. 231 
20 Lon 
. 232 
IV. REPORTS AND PROCEEDINGS. 
Geological Society of London— 
February 23, 1916 
March 8 : 
March 22 
April 5. : 
Mineralosical Society 
Geological Society of Glasgow 
Ne CORRESPONDENCE. 
J. B. Serivenor © 
VI. MISCELLANEOUS. 
The Zoological Record . 
. 234 
i.. 200 
... 206 
ERO 
-.. 238 
. 239 
. 239 
. 240 
87 SOHO SQUARE, W. 
Volume for 1915 of the GEOLOGICAL MAGAZINE is ready, 
res Cloth Cases for Binding may be had, price ls. 6d. net, 
he 
6s. 
Oe 
