THE 
AMERICAN 
ATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE, 
4 
a. a 
JANUARY, 189r. 
ONTENTS. 
PAGE 
RECENT Papers ON EARTHWORMS, 
FEA = I 
Botanist of New York—How to Know 
eir Leaves; nn s fee 
HANICAL ORIGIN OF STRUCTURE IN 
Look — ia 
Ecyrops [Illustrated], Robert ieee Jackson, 11 Gaevle of Spiders—insects r r s 
IMMOBILITY AS A CAUSE OF THE DE- Studies on = 
OF THE PNE 
Conway Macmillan, 22 | — 
SAL SEES [Mustrated], 
E A, Andrews, PhD., 
25 
36 
39 
42 
pirm ' 
