VoL. XXXIII, No. 394 
dap 
THE 
AMERICAN 
NATURALIST. 
es 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
-IN THEIR WIDEST SENSE 
CONTENTS 
. Notes on European Museums . 0. C. FARRINGTON 
s i Some Changes in the Names, POR nn speci, o of Certain 
= Utility of Piemoreusaen’ in Boop Sea Animals : c. C. NUTTING 
A New Hydroid from Long Island Sound . .  . © P. SIGERFOOS 
A Balloon-Making Fly ; ; J. M. ALDRICH and L. A. TURLEY 
Have we more than One Spécien of Blissus in North America? 
F. M. WEBSTER 
. Synopses of e ASEE Invertebrates. IV. Astacoid and 
Thalassinoid Crustace . J. S. KINGSLEY 
Reviews of Recent Literature: Baai Biology. i Action of Salt Solutions 
upon Eggs, History of the Natural Sciences — Anthropology, The Races 
of Europe, Anthropological Notes — Psychology, Psychology of Para- 
mecium — Physiology, Ocular Changes Induced by Low Temperature, 
Birch’s Physiology, Formation of Fibrinogen — Zoölogy, The Rotifera, — 
Segmentation of Insect Head, The Spn Nerves of ASE Notes 
News 
Correspondence 
Publications Received 
BOSTON, U.S. A. 
GINN. & COMPANY, PUBLISHERS 
9-13 TREMONT PLACE 
Sew ek = Chica : London 
OCTOBER, 1899 
a go Fifth Avenue ee 378-388 Wabash Avenue r 9 Beso street, swan es 
