Protozoa and Rot if era at Havana, III. 357 



Melicertidce. Corona not produced into setigerous 

 lobes; buccal orifice lateral; ciliary wreath a mar- 

 ginal continuous curve, bent on itself at the dorsal 

 surface, so as to encircle the corona twice, with the 

 buccal orifice between its upper and lower curves, 

 and having also a dorsal gap between its points of 

 flexure; trophi malleo-ramate (Fig. 3, E) ; usually 

 inhabiting tubes made of pellets. 



II. Order Bdelloida. Swimming with their ciliary wreath 



and creeping like a leech; foot wholly retractile 

 within the body, telescopic, ending almost invariably 

 in three toes. 



Philodinidce. Corona a pair of circular lobes trans- 

 versely placed ; ciliary wreath a marginal continu- 

 ous curve, bent on itself at the dorsal surface so as 

 to encircle the corona twice, with the buccal orifice 

 between its upper and lower curves, and having also 

 two gaps, the one dorsal, between its points of flex- 

 ure, the other ventral, in the upper curve, opposite 

 the buccal orifice; trophi ramate. (Fig. 3, H.) 



Adinetidce. Corona a flat surface, facing ventrally; 

 ciliary wreath the furred ventral surface of the 

 corona; tropin ramate (Fig. 3, H) ; frontal column 

 soldered to dorsal surface, and ending in two hooks. 



III. Order Bloima. Swimming with, their ciliary wreath and 

 (in some cases) creeping with their toes. 



1. Suborder Illoricata. Integument flexible, not stiff- 

 ened to an inclosing shell, except in Pla'soma; foot, 

 when present, almost invariably furcate, but not 

 transversely wrinkled ; rarely more than feebly tele- 

 scopic, and partially retractile. 



Microcodonidce. Corona obliquely transverse, flat, cir- 

 cular ; buccal orifice central; ciliary wreath a mar- 

 ginal continuous curve encircling the corona, and 

 two curves of larger cilia, one on each side of the 

 buccal orifice; trophi forcipate (Fig. 3, D) ; foot 

 stylate. 



Asplanchnida. Corona subcorneal, with one or two 



