VOL. XXXIII, No. 389" MAY, 1899 
THE 
AMERICAN 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE 
CONTENTS 
I. Studies on Reactions to Stimuli in Unicellular Sepan 
Dr. H. S. JENNINGS 
H 
. Vacation Notes. II. The Northern Pacific Coast 
Professor DOUGLAS H, CAMPBELL 
III. Is the White River Tertiary an Æolian Formation? W. D. MATTHEW 
i 
s 
V. On the Habits and Structure of the Coccid Genus Margarodes 
Professor T. D. A. COCKERELL 
Editorial Comment : a meld dS Moth and Ben a aiene A ; Zoo- 
logical Instruction in German and American Universities ; Seen 
Birds’ Fees ; Are Bird Migrations Affected $ by an Extreme ostot 
Winter 
VII. Reviews of Recent Literature: Anthropology: The Neolithic Period of 
an Culture in Northern Africa; Prehistoric Art ; The Lamp of the 
a 
Plankton of the Limfiord — Physiology : Ocular Accommodation ; 
Sense of Hearing; es ang for ede Overton’s Physiology 
Animal Hypnotism — Zod/ogy: Generic Names Preoc ape Deep-Sea 
Fishes of Iceland; Spolia Atlantica; Fishes of New S outh Wales; 
ater Ostracoda o 
Vines’s Text-Book; The Teacher’s Leaflets; Elementary Science Bulle- 
tins; Water-Lenticels ; Root-Tubercles of Alder; The Red and Blue 
Coloring Matter of Flowers ; Botanical Not 
VIII. News 
IX. Publications Received 
OSTON, U.S.A. 
GINN & COMPANY. PUBLISHERS 
9-13 TREMONT m 
New York : : Chicago 
Ovum in Ovo K Professor F. H. HERRICK 
449 
455 
460 
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