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PRY TRS 
OF oy 7 
EDITED BY 
Cc. O. WHITMAN, 
po Head Professor of Biology, Chicago University. 
: WITH THE CO-OPERATION OF 
oe EDWARD PHELPS ALLIS. 
Reee es Milwaukee. 
Vor. XII. FEBRUARY, 1897. No. 2. 
BOSTON, U-S:A-: 
GINN & COMPANY. 
AGENT FOR GREAT BRITAIN: AGENTS FOR GERMANY: AGENT FOR FRANCE: 
EDWARD ARNOLD, R. FRIEDLANDER & SOHN, JULES PEELMAN, 
37, Bedford Street, Strand, Berlin, N.W., 189, Boulevard Saint- 
London, W.C. Caristrasse 11. Germain, Paris. 
“BY e 
