594 



FRESH-WATER BIOLOGY 



Fig. 895. Diurella sulcata 

 Jennings. X 35o. (After 

 Dixon-Nuttall.) 



Fig. 897. RaUulus latus 

 Jennings, r, right toe; 

 I, left toe. X 225. 

 (After Jennings.) 



Fig. 898. A, RaUulus 

 longiseta Schrank. X 

 200. B, Trophi of same. 

 (After Jennings.) 



