52 



HANDBOOK OF INVERTEBRATE ZOOLOGY. 



1. The ab-oral surface of the umbrella is covered by 

 large, flat, nucleated cells (Fig. 26, a) which are quite 



FIG. 26. 



FIG. 26. Ab-oral surface of a young medusa of Eucope, about twelve 

 hours after its escape from the reproductive calycle; from au osmic acid 

 specimen, magnified about two hundred diameters. (Drawn from nature 

 by W. K. Brooks.) 



a. Upper surface of umbrella. b. Edge of umbivll.i. c. T< : 

 d. Enlarged inner side of tentacles, e. Shafts of tentacles. /. Otocysts. 



