THE WHEEL ANIMALCULES (ROTATORIA) 605 



85 (82) Foot projects from posterior end. . Family BRACHIONIDAE . . 86 



Lorica consisting of a convex dorsal plate and a flat ventral one; usually stout and armed 

 with spines, though not always. Lorica opened behind for the long, strong foot which is often 

 covered with close rings. Foot either ending in two toes or forked at its free end. 



86 (89) Foot not forked 87 



87 (88) Lorica very convex dorsally Brachionus Ehrenberg. 



Many species. 



Representative species (Fig. 922). . . Brachionus pala Ehrenberg. 



(Fig. 921,^) B. punctatus Hempel. 



(Fig. 921,5). . . . B. quadratus Rousselet. 



(Fig. 923) B. angularis Gosse. 



(Fig. 925) B. mollis Hempel. 



88 (87) Lorica flat Noteus Ehrenberg. 



Foot not ringed. 



Representative species (Fig. 926). . Noteus quadricornis Ehrenberg. 



89 (86) Foot forked at its end Schizocerca Daday. 



Only one species (Fig. 924). . . . Schizocerca diversicornis Daday. 



