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 an osmic acid 

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

 by W. K. Brooks.) 



a. Upper surface of umbrella. b. Edge of umbrolla. c. Tentacles. 

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



