604 



FRESH-WATER BIOLOGY 

 A 



FIG. 921. A, Brachionus punctatus Hempel. X 400. (After 

 Dixon-Nuttall.) B, Male of Brachionus quadratus Rousselet. 

 (After Marks and Wesche".) 



FIG. 922. Brachionus pala Ehr. 

 X 160. (After Weber.) 



FIG. 923. Corona of Brachionus 

 angularis Gosse. (After Wesen- 



berg-Lund.) 



FIG. 924. Schizocerca diversicornis 

 Daday. Xsoo. (After Wier- 

 zejski.) 



FIG. 925. Brachionus mollis HempeL 

 X 280. (After Hempel.) 



FiG. 926. Noteus quadricornis 

 Ehrenberg. X 144. (After 

 Hudson and Gosse.) 



