$4.60 per Year (Foreign). SS ete gee Coe 
THE 
AMERICAN 
NATURALIST 
A MONTHLY JOURNAL S 
DEVOTED TO THE NATURAL SCIENCES 
; IN THEIR WIDEST SENSE. 
NG EDITORS: 
Prors. E. D, COPE, Philadelphia, anp J. S. KINGSLEY, Boston, 
hy SS eee EDITORS: 
č CL WEED, Dur iicago DR C BESSEY, Lineoin, Neb., ..€ MERCE ee LEA 
i ED, Durhani, N. Hy sa a S.. BAYLEY, Waterv. ie, Maine, fas KA; EWS, Baltimore, 
i . W. H. HOBBS, aai Wis. 
JUNE, 1894. No. 330 
CONTENTS: 
3 | AGE. 
UNG OF FREE-LIFE. Henry L. Clark 7 ABB 
oF Mop ODERN PHYSIOLOGY. . (Concluded. 5 
ederié 5. Lee. 473 
LIGHTS | OF THE GROUSE LOCUST (T 
PAG 
the Belgian Cretaceous—Geological News— 
Gen pk — Archean — Paleozoic — Mesozoic — 
Cen 
Trcka ont RERA T Roio 
LATERALIS Say,) IN NortH EASTERN | from. Trans-Pecos Texas—The Differentiation 
> _ Mlustrated. ) Joseph L. inak 483 | of Rock Magmas—The Old Volcanics of South 
Ice Dam AND A LIMIT To THE ICE . Mountain, Pennsylvania—Another Occurrence 
pe erat OHIO. Tri | of Websterite—Pettographical News — Pied- 
OA, m 488 | 
TE U. . Dione Academ of | American Minerals—Mineral Syntheses. ~ . 514 
ee be 
CO 40 
isd 
baa 
t5 AND Parant. 
LITERATI Zoological Ne sie O R ane 
RE +The Wooda Holl Lectures 
Hexapoda—Hemichorda. 
T Lim max maximus. ¿ 
1889-91—Mineral Resources 5 
e Fauna—New Polyzoans from 
apie T 
ge a ete iary Tipulide—Dr. Packard 
SCIENTIFIC NEWS... - 
United States, 1892, - 500 rispata—Miss s Ormerod’s Re bsg 
; EN oe York Gir orib- News ees 1532 
nd Travels —The Grand Falls of — |- Psychology—The Rëcidivist- . 537 
i 3 | Microscopy — Marine Planar fang => Breeding 
Paleonibiogy.= Continuity of the | Habits of the Three Triclads of Limulus 544 
The Colorado Formation and | PROCEEDINGS. OF SCIENTIFIC SOCIETIES. ~ - sir : 
| PHILADELPHIA, U.S. A. 7 a 
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FOREIGN AGENTS: 
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D, LONDON. ENGLAND. 
