Bulletin of the Museum of Comparative Zoology 
AT HARVARD COLLEGE. 
Von. XXX. No. 1. 
THE EARLY DEVELOPMENT OF ASPLANCHNA 
HERRICKII DE GUERNE. 
A. CONTRIBUTION TO DEVELOPMENTAL MECHANICS. 
By HERBERT S. JENNINGS. 
Wırn Ten PLATES. 
CAMBRIDGE, MASS., U. S. A: 
PRINTED FOR THE MUSEUM. 
Ocronxkn, 1896. 
