Re : 3 AN a 
eee = 
E st € TY 
Y, 
Swe, a TPRANCH 
Biolog cal / 
; ee ire: ies er 
ees FEBRUARY, cig SP yy oi aio 
ee No. 2. 
j. Brackenridge Clemens, 
Died 1867. 
PHILIP P. CALVERT, Ph.D., Editor. 
E. T. CRESSON, Jr., paves Editor. 
HENRY SKINNER, M.D., Sc.D., ‘Editor Emeritus. 
; ADVISORY COMMITTEE: 
EZRA T. CRESSON. 
J. A. G. REHN. 
PHILIP LAURENT, 
ERICH DAECKE, H. W. WENZEEt 
PHILADELPHIA : 
Tue ACADEMY OF NATURAL SCIENCES, 
$3 LOGAN SQUARE. 
Entered at the Philadelphia Post-Office as Second-Class Matter. 
