70 D. BRYCE ON A NEW CLASSIFICATION OF THE BDELLOID ROTIFERA. 



Rotifer Schrank 1 



Viviparous. 



B. longirostris (Janson) 38. 



var.JiTnbriata Murray 59. 



var. bit07'quata Murray 64. 

 jR. tardigradus Ehrenberg 2, 3. 

 R. elongatus Weber 26. 

 R. trisecatus Weber 26. 

 R. spicatus Murray 51. 

 R. mento Anderson 30. 

 R. citrinus Ehrenberg 4. 



R. vulgaris Schrank 1. 

 R. Tiiacrurus Schrank 1. 

 R. ovatus (Anderson) 30. 

 R. neptunius Milne 18. 

 R. ctctinuriLS Janson 38 

 ( Actin. neptunius Ehr. 2, 3). 

 R. magnicalcarata (Parsons) 32 

 ( = ? Callidina socialis Janson 

 38). 



b. Foot ending in four toes. 



* With distinct throat. 



f Skin coarse and leathery. 



Dissotrocha gen. nov. 



Viviparous ; abdominal transverse skinfolds few and corre- 

 sponding to segment boundaries. 



D. spi7iosa (Bryce) 33. 



D. aculeata (Ehrenhevg) 2, 3. 



D. macrostyla (Ehrenberg) 4 



Pleuretra gen. nov. 



Oviparous ; abdominal transverse skinfolds numerous and not 

 corresponding to segment boundaries. 



P. alpium (Ehrenberg) 10. 

 F. humerosa (Murray) 55. 



P. brycei (Weber) 47. 



ft Skin usually smooth and flexible. 

 Embata gen. nov. 



Spurs usually long and heeled ; animals mostly ectoparasitic 

 upon water-dwelling larvae, isopods, etc. ; viviparous or oviparous. 



E. parasitica (Giglioli) 12. 

 E. hamata (Murray) 58. 

 E. laticornis (Murray) 55. 



E. laticeps (Murray) 55. 



E. commensalis (Western) 35 



