706 



PROTOZOOLOGY 



stalk striated, about 150-270m long; tentacles in 4 groups; nucleus 

 ovoid; 1-3 contractile vacuoles; attached to the plastron of the tur- 

 tle. 



Family 6. Discophryidae Colhn 



Genus Discophrya Lachmann. Elongate; a short stout pedicel with 

 a plate; tentacles evenly distributed on anterior surface or in fasci- 



FiG. 332. a-d, Anarma multiruga, X about 230; b, budding individual; 

 c, cross-section; d, with an internal ciliated bud; e, f, Squalor ophnj a 

 macrostyla, X about 670; f, cross-section; g, Multifasciculatum elegans, 

 X about 660 (Goodrich and Jahn). 



cles; contractile vacuoles, each with a canalicule leading to body 

 surface; mainly fresh water. Several species. 



D. elongata (Claparede and L.) (Fig. 333, /). Cylindrical; tentacles 

 on anterior end and in 2 posterior fascicles; stalk striated; about 80/i 

 long; on the shell of Paldina vivipara in fresh water. 



Genus Thaumatophrya Collin. Spherical; long stalk; tentacles dis- 

 tributed, tapering toward distal end; salt water. One species. 



T. trold (Claparede and Lachmann) (Fig. 333, g). About 75/i in 

 diameter. 



