AMERICAN 
ATURALIST 
A MONTHLY JOURNAL 
DEVOTED. TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE. 
MANAGING EDITORS: 
Prors. E. D. COPE, sete AND Sy. S. KINGSLEY, Boston. 
SSOCIATE EDITORS: 
WHITMAN, Chicago, Dr. E E BESSEY, Lin , Neb., H. C. MERCER, apeo an 
WEE DREWS, Baltimore, 
D, Durbam, N. H., ~ Pror. W.S. BAYLEY, PRALE Mains: Pror. E, A. AN 
Pror. W. H. HOBBS, Madison, Wis. 
MARCH, 1894. 
CONTENTS. 
TERT PAGE. | 
hag EVOLUTION. £. D. Cope. 205. | of ~ Madagascar—Antenne in Trilobites — Devel- 
ATION OF THE ARTHROPO | opment of the Brachial Supports 10 a 
Geological! News—Mesozoic—Cenozoic. 263 - 
3 i go 
DA. 
Knet 22 
itability of Noctiluca— The 
e 
d among the Ants—Zoolo 
A JOTE ON THE News, Mollusca—Urochorda—Memmalia. . , 
OF THE Region. ` (Illustrated. ) la seas dame E and the Formation of- 
‘ J. B.. Hatcher. 2 | ‘Organs. j 
ity Postal Boxes.—The Congress of -| | Entomology.—The Four- lined Leaf-bug hata 
—Indiana Libr sige harder at Curious 
pan teron—North A n Membracida—Colors 
of Lepidopterous Larvae Fh ect. of Ar-enites on 
Sai 3 a RUS SIEA of the Mole. Cricket— 
Nahi 
ROCEEDINGS OF SCIENTIFIC SOCIETIES. 
Indiana Acadamy of Sciences—Boston Society d 
NTE. History— The Bivlogical Society of Wash- 
— New York GETT of Sciences, Roe 
A Paleontology—Trans-Pecos Texas— | 
the Duration of the Glacial Epoch ` | Stetion. 
Marthas Vineyard —— Plistocene Birds -~ | SCIENTIFIC NEWS- 
PHILADELPHIA, u. S. A. 
