SUCTORIA 



871 



Fig. 370. a, Acineta tuberosa, X670 (Calkins); b, A. cuspidata, X670 

 (Stokes); c-e, Tokophrya infusionum (c, X400; d, a free-swimming bud; 

 e, a young attached form, X800) (Collin); f, T. cyclopum, a young 

 individual, X500 (Collin). 



T. cothurnioides C. (Fig. 371, a). Lorica about 50ju high; stalk 

 knobbed; on Cletodes longicaudatus. 



T. gracilis (Wailes) (Fig. 371, b). Lorica 110/x by 35 M ; stalk 200m by 

 4/jl; on hydrozoans. 



Genus Periacineta Collin. Elongate lorica; attached with its 

 drawn-out posterior end; tentacles from the opposite surface in 

 bundles; fresh water. 



