238 



TBOCHELMINTHES 



Key to the genera of Notommatidae here described: 

 Oj Auricles present. 



61 Body not conspicuously annulated. 



c, Very large rotifers with 3 or 5-lobed brain 1. Copeus 



Ca Not large and brain not lobed 2. Notommata 



62 Body conspicuously annulated 3. Tapiirocampa 



Oj Auricles absent. 



61 Toes minute 4. Proales 



63 Toes conspicuous 5. Fubcularia 



1. CoPETJS Gosse. Large rotifers, slow-moving, usually enlarged 

 behind the middle; brain 3-lobed; body projects backward from the foot, 

 forming a tail; auricles present: 7 species; vegetable feeders. 



C. pachyurus Gosse (Fig. 381). Tail rounded and thick; auricles 

 large; brain 3-lobed; foot 2-jointed; length .33 mm. 



Fig. 381 



Fig. 382 



Fig. 383 



Fig. 381 — Copeus pachyurus (from Sussw. F. Deut.). Fig, 382 — Notommata tripus 

 (Siissw. F. Deut.). Fig. 383 — Tapiirocampa annulosa (Siissw. F. Deut.). 



2. Notommata Ehrenberg. Small rotifers with an elongate body 

 and auricles; tail usually present; foot and toes usually small: many 

 species; among water plants. 



N. tripus Ehr. (Fig. 382). Tail as long as the toes, the animal 

 appearing to end behind in 3 toes; length .1 mm. 



N. tnincata Jennings. Body red in color, long and truncate at each 

 end ; cilia extending on to ventral surface ; foot very small. 



3. Taphrocampa Gosse. Body small and with numerous perma- 

 nent annulations; small tail just above the foot: 4 species. 



T. annulosa Gosse (Fig. 383). Minute rotifer with a cyl- 

 indrical body and with a pair of small auricles; length .1 mm. 



4. Proales Gosse. No auricles or tail present; toes 

 inconspicuous; body small and cylindrical: 8 species. 



P. sordida Gosse. Body thick; head broad, with an eye; 

 foot very broad; toes conical; length .22 mm. 



5. FuRCULARiA Ehrenberg. Auricles absent; body cyl- 

 indrical or bulging in the middle; toes conspicuous; eye red 

 at apex of head : 12 species. 



F. forficula Ehr. (Fig. 384), Body cylindrical, with straight sides 

 and .35 mm. long: abundant. 



Fig. :584 

 Furcularia 



forficula 

 (Siissw. F. 



Deut.). 



