Wemoirs of the Museum of Comparative Zoilogy 
AT HARVARD COLLEGE. 
Vou. IX. No. 8. 
SELECTIONS 
FROM 
EMBRYOLOGICAL MONOGRAPHS. 
COMPILED BY 
ALEXANDER AGASSIZ, 
WALTER FAXON, anv H. L. MARK. 
1ah; 
ACALEPHS, AND POLYPS, 
By J. WALTER FEWKES; By E. L. MARK. 
WITH THIRTEEN PLATES. 
CAMBRIDGE: 
Printed for the fAluseum, 
SepremMBer, 1884. 
