THE WHEEL ANIMALCULES (ROTATORL\) 589 



10(11) Eye in neck region Proalcs Gosse 



Small, slow-moving, soft-bodied species, with partly ventral corona. Many species. 



Representative species( Fig. 856, page 555) . Proaleswerneckii Ehrcnberg. 

 (Fig. 858, page 557). . . . P. sonlida Coasc. 

 (Fig. 859, page 558). . . . P. tigrida Gossc. 



11(10) Eye near front Furcularia EhrcnhcTg. 



Cuticula a little stiffer, so that the form is retained; shape at times a little prismatic; toes 

 longer and stiflfer than in Proales; active. Species numerous. 



Representative species (Fig. 870). . Furcularia jorficida Y.\\mi\\)<:rg. 

 (Fig. 871) F. longiscta Ehrcnberg. 



12 (9, 15) With two eyes 13 



13(14) Eyes near front Digloia Ehrcnhcvg. 



Strong predacious species with forcipate jaws; toes usually large. One or two species. 



Representative species (Fig. 872). . Diglena rostrata Dixon-Nuilail. 

 (Fig. 860, B, page 559). . D.forcipata Ehrcnberg. 



14 (13) Eyes in neck Dlstemma Ehrcnberg. 



Representative species (Fig. 873). . Distemma setigeriim Ehrcnberg. 



15 (9, 12) With three eyes in a transverse row. . Triophthalmiis Ehrcnberg. 



One species only (Fig. 874) Triophthalmiis dorsualis. 



16 (8) Without eyes. 



17(18) Internal parasites ^/6er/w Dujardin. 



Few species. 



Representative species (Fig. 875) ilbertia intrusor Gossc. 



18 (17) Free, or external parasites Pleurotrodm Ehrcnberg. 



Few species. 



Representative species (Fig. 876). . . Pleurotrocha grandis Western. 



19 (7) With auricles ■^o 



N.B. Auricles invisible when contracted. 



20 (25) With one eye - ^^ 



21 (24) Smaller, soft-bodied forms 22 



22 (23) Cuticula with many transverse folds Taphrocampa Gosse. 



Representative species (Fig. 877). . Taphrocampa annulosa Ciossc. 



