per Year. =. xs - $160 per Year ‘Forces 
THE 
|». AMERICAN 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE. 
MANAGING EDITORS 
Prors. E. D. COPE, Philadelphia, AND J. S. KINGSLEY, Boston. 
stel EDITORS: 
Dn. EY, Lincoln, Neb., THOMAS WILSON, Washington, 
Paor. W. ‘s: jen cog aterville, Maine, Pror. E. A. ANDREWS, uem 
LOCKINGTON, Rugby, England. 
ž d x 
RON Sie eee Pg 
DECEMBER, 1893. No. 324 
O. WHITMAN, Chicago, 
. C. M. WEED, Durham, N. H., 
CONTENTS. 
i PAGE. 
"ES ON THE COCHINEAL INSECT. Geological News Paleozoic—Mesozoic—Cenozoic. “Tose 
7.2. 4. matte 1041 Mineralogy and Petrography.—The Schists of 
10) OGY IN ITS GENERAL "gp (Co Southern Berkshire, ssachusetts— The Phono: ^ 
» pon . 1050 lytes of the Hegau—The Rock of a New Island, — 
LO! "VARIATIONS. OF THE Mus SNAKE. off Pantelleria—Petrographical News—Analyses | 
Ilostrated T D. Cope. 1066 | of American EES American 
- ‘eae eie Periodicals Physical Properties of Mi —Instruments. 
for’ the cs M h Com- Zoology.—The didi of the Water Mains of 
Paris—The Cees HMM of the Galapagos 
Wie Origin of the Human Feci Ehe piss 
Squirrels of the Mississippi breues: 
dei ric POR 4 
of Chipa Lilium 
' ETEA of Embryology. Ls 
em. ieee iia ord en. 
T —Recent cera 
