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



Adineta Hudson and Gosse 19. 



Foot slender, with two spurs and three toes. 



A. vaga (Davis) 15. A. tuberculosa Janson 38. 



A. oculata (Milne) 18. A. harbata Janson 38. 



A. longicornis Murray 59. A. gracilis Janson 38. 

 A. grandis Murray 66. 



II. Family Philodinidae. 



Bdelloids with fully developed rostrum, usually revertilo. 

 Corona of two functionally distinct wreaths of cilia ; the^ 

 trochus, dorsally and ventrally interrupted, passing nearly 

 round the peripheries of two elevated discs, and creating twin 

 vortices ; the cingulum, dorsally interrupted, passing from 

 behind the pedicels round their bases, and thence round inferior 

 margin of mouth. Corona retractile within mouth. 



Thirteen genera. 



A. Lumen of stomach relatively wide or bag-like. Food usually 

 agglutinated into pellets. Upper lip usually undivided.. 

 Oviparous. 



a. Pedicels rudimentary or absent. 

 Ceratotrocha gen. no v. 



Trochal discs inset between or beneath two fleshy processes, 

 resembling horns. 



C. cornigera (Bryce) 37. 



Scepanotrocha gen. nov. 



Trochal discs inset beneath wide hood-like membranous ex- 

 pansion of upper lip. 



S. rubra sp. nov. | aS'. corniculata sp. nov. 



