? ae A pike lee ees eas ably Pais RN 
ATURAL 
2. SCIENCE 
A MONTHLY REVIEW OF SCIENTIFIC PROGRESS 
SEPTEMBER 1898 
Contents 
Notes and Comments g 2 « 145 
Vaccination—Christmas Island—Notes on Sea-Fisheries—Steam-Trawling off Jamaica— 
Ascidians and Bipolarity—Deep Atlantic Holothurians—Bipolarity with a Vengeance 
—The Age of the Isthmus of Panama—-Migration and Homotaxis—Studies in 
Auxology—aAn Evolving Species—The Royal Bohemian Museum, Prague (with Plate II.) 
—The Geological Survey—New Silurian Fishes—Extinct Rhinoceroses—On Cyclamen 
—tThe Female of Heterogyna 
Zoological Jamaica. By Hubert Lyman Clark, Ph.D. : : . , + 2 216K 
The Eskers of Ireland. (PartI.) By Thomas Fitzpatrick, LL.D. . cs 4 i G 172 
‘The Chemistry of the Forest Leaf. By P. Q. Keegan, LL.D. . ; j A - See ei 
The Species, the Sex, and the Individual. (PartI.) By J. T. Cunningham, M.A., F.Z.S. . . 184 
‘The Delimitation of the Albian and Cenomanian in France. By A. J. Jukes-Browne, M.A.,F.G.S. 193 
Some New Books B é : ‘ ; : : F : : iY Gaggg 
Welwitsch’s African Plants: by W. P. Hiern—Garden-Making and The Pruning-Book: by 
L. H. Bailey—Birds of Cumberland, N.S.W.: by A. J. North (H. A. Macpherson)—Life 
of A. G. More: by C. B. Moffat (H. A. M.)—The Cubomedusae: by F. S. Conant (S. J. 
Hickson)—Maryland Geological Survey: by W. B. Clark and others—Official Guides 
to Down and Antrim: by R. L. Praeger and others—Vitalism—Scraps from Serials, &c. 
News . a 5 - : ; 3 ‘ : ; 4 ; 212 
Correspondence : ee : , : E i d , : : 215 
F. A. Bather—J. Lionel Tayler 
LONDON 
J. M. DENT & CO., 29 and 30 Bedford Street, W.C. 
PRICE ONE SHILLING NETT 
In America, Thirty Cents 
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N.B.—For Price of Sets, see Special Note on page 216. 
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