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DEVOTED TO THE NATURAL SCIENCES 
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OBERT P. BIGELOW, Boston, 
ASSISTED BY AN EDITORIAL BOARD AND THE FOLLOWING 
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W. E. RITTER, S. WATASE, ‘ 
F. RUSSELL, ©, M. WEED 
E. F. SMITH, 
Vol. XXXI. * 
SEPTEMBER, 1897. 
CONTENTS: 
PAGE 
BIOLOGY AND MEDICIN 
William H. Weich, M.D; BL. D 
HAIR AND FEATHERS, (IHustrated. ) 
J. S. Kingsley. 
Bigps or THE GALAPAGOS ARCHIPELAGO: A CRITI- 
CISM OF MR. ROBERT RIDGWAY’S PAPER. 
755 
767 
G. Baur; Phe Dy Vil 
THE A nvin 
HE ADVANCE OF Biolocy IN 1895. 
CF sess i 
Tae Swamps: or Oswrco County, N;-¥., Al 
: THEIR FLORA. (Concluded.) W. W. Rawlee. 
Evrrors Tante. —Our Plans—-L’ Année Biologique 
— Scattered Biological Data — American 
_ Journal of Phy ysiology. 
Recent LITERATURE — Tarr’s 
ology U. sg. 
Elementary Ge- 
Commission of Fish and 
A List of zai 
GENER RAL Nor 
Petrog: 
f ia ENS “igneous Rocks of Trans-Pecos, 
Apane pes of British Birds— 
eals. g 
792 
Texas—Italian Petrographical Studies—Rock 
Differentiation —Granites of Pyramid Peak = 
District, California—Pegmatite.  - . 805. 
Botany— Gray's oes, E lora— Britton | 
and Brown’s Hlustrated Flor : 
Zoology—Fauna of pines List of e 
Birds of the Vicinity of West Chester, aa 
Co., Pennsylvania. (Continued.) Z: 
Entomology—Protective Value of Mattos 
Ambrosia Beetles—The Brown-Tailed Moth. - Si 
Embryology—Spinning in Serpula Eggs, . a 
Psycholegy—Some Ex periments on the Tactual 
Threshold for the Perception of Two Points— - 
The Année Biologique. 3 
Anthropology—The Toinahiteck of sive North : 
American Indian—A Triple Indian Grave in 
Western New York. PUNTA . oA 
SCIENTIFIC NEWS. . 
PHILADELPHIA, U. S. A. 
SN een s DOCEER = 
518 ano 520 MINOR STREET. 
he idly bia Pont Office as RAIRE matter. 
