596 



FRESH-WATER BIOLOGY 



FlG. Qoo. Colurus grallator 

 Gosse. X375. (After Weber. 



FIG. 899. Stephanops in- 

 termedius Burn. X 350. 

 (After Weber.) 



FIG. 901. Metopidia 

 bergii Perty. X 400. 

 Jennings.) 



ehren- 

 (After 



FlG. 902. Cochlearet urbo Gosse. 

 X 200. (After Gosse.) 



FlG. 903. Scaridium langi- 

 caudum Ehr. X 200. 

 (After Dixon-Nuttall.) 



FlG. 904. Dinocharis pocillum Ehr. A, Female. B, Male. 

 Xsoo. (After Weber.) 



