592 



FRESH-WATER BIOLOGY 



Fig. 886. 



Salpina spinigera £hr. X 200. 

 (After Weber.) 



Fig. 888. Diflois daviesiae Fig. 889. Diplax videns 

 Gosse. X 87. (After Levander, X 267. (After 

 Weber.) Lucks.) 



A 



Fig. 890. Distylainermis Bryce. A, Dorsal view; B, con- 

 tracted; C, side view. X 225. (After Dixon-Nuttgll.) 



Fig. 887. Diaschiza koodii Gosse. 

 A, Female. B, Male. X 300- 

 (After Dizoa-Nuttall and Free- 

 man.) 



Fig. 89 1 . Distyla okioensis Herrick 

 X 420. (After Jennings.) 



