6o4 



FRESH-WATER BIOLOGY 



A 



Fig. 921. A, Brackionus 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 

 annularis Gosse. (After Wesen- 

 berg-Lund.) 



^v^_ 



Fig. 924. Schizocerca dkersicornis 

 Daday. X300. (After Wier- 

 zejski.) 



Fig. 925. Brachionus mollis Hempcl. 

 X 280. (After Hempel.) 



FlG. 926. Noteus quadricornis 

 Ehrenberg. X 144. (After 

 Hudson and Gosse.) 



