JOURNAL 



OF 



MORPHOLOGY. 



i 



i 

 ft 



EDITED BY £' 



C. O. WHITMAN, jf 



Professor of Animal Morphology, Clark University, Worcester, Mass. 



WITH THE CO-OPERATION OF 



EDWARD PHELPS ALLIS, Junr., 



Milwaukee. 



Vol. V. 



September, 1891. 



No. 2. 



BOSTON, U.S.A.: 

 GINN & COMPANY. 



Agent for Great Britain : 



W. P. COLLINS, 



7J7, Gt. Portland Street, 



London, W. 



Agents for Germany : 



R. FRIEDLANDER & SOHN, 



Berlin, N. IV., 



Carlstrasse u. 



Agent for France : 



JULES PEELMAN, 



i8g, Boulevard Saint- 



Germain, Paris. 



