THE WHEEL ANIMALCULES (ROTATORIA) 607 



90 (4) Jaws incudate, save in Ascomorpha. Intestine and anus lacking, save 

 in Dinops Suborder Asplanchnina. 



Sac-shaped rotifers, usually without a foot, though in some cases a small foot is present on 

 the posterior part of the ventral surface. 



One family only Family ASPLANCHNIDAE . . 91 



91 (94) Foot present 92 



92 (93) Intestine absent Asplanchnopus de Guerne. 



Two or three species. 



Representative species (Fig. 927) 



Asplanchnopus myrmeleo Ehrenberg. 



93 (92) Intestine present. Harringia Beauchamp. 



Only one species (Fig. 928) Harringia eupoda Gosse. 



94 (91) Foot absent 95 



95 (96) Large clear rotifers with incudate jaws. .... Asplanchna Gosse. 

 Many species. 



Representative species (Fig. 929). . . Asplanchna priodonta Gosse. 

 (Fig. 869, page 583). . A. herrickii de Guerne. 



96 (95) Very small rotifers, usually colored or opaque; jaws not incudate. 



Ascomorpha Perty. 

 One or two species. 



Representative species (Fig. 930). . . . Ascomorpha ecau&is Perty. 



