SUCTORIA 875 



each with a permanent canal and a pore; attached directly or indi- 

 rectly to the carapace and plastron of the turtle. 



Genus Squalorophrya Goodrich and Jahn. Elongate; radially sym- 

 metrical; lorica, rigid, close-fitting, covered with debris; with a stalk ; 

 capitate tentacles at distal end; ectocommensal on Chrysemys picta 

 bellii. 



S. macrostyla G. and J. (Fig. 372, e, /). Cylindrical, with 4 longi- 

 tudinal grooves; body about 90m by 40/x; striated stalk, short and 

 thick, about 30/* long; lorica highly viscous with debris; nucleus 

 ovoid to elongate, sometimes Y-shaped; 2 contractile vacuoles, each 

 with a permanent canal and a pore; on Chrysemys picta bellii. 



Genus Multifasciculatum Goodrich and Jahn. Radially or bilat- 

 erally symmetrical; stalked; without lorica; pellicle thin; several 

 fascicles of tentacles on distal, lateral and proximal regions of body; 

 ectocommensal on Chrysemys picta bellii. 



M. elegans G. and J. (Fig. 372, g). Body ovoid; 50-90/x by 20-50/z; 

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

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

 tle. 



Family 6. Discophryidae Collin 



Genus Discophrya Lachmann. Elongate; a short stout pedicel with 

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

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

 surface; mainly fresh water. Several species (Swarczewsky, 1928b). 



D. elongata (Claparede and L.) (Fig. 373, /). Cylindrical; tentacles 

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

 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. 373, g). About 75/z in 

 diameter. 



Genus Rhynchophrya Collin. Oblong; bilaterally symmetrical; a 

 short striated stalk; 1 main long and a few shorter tentacles; 6-10 

 contractile vacuoles, each with a canalicule leading to outside; fresh 

 water. One species. 



R. palpans C. (Fig. 373, h). 85/* by 50/*; tentacles retractile, 10- 

 200/x long; stalk 20/z by 10/z; on Hydrophilus piceus. 



Genus Choanophrya Hartog. Spheroidal to oval; stalked; 10-12 

 tentacles; tubular, expansible at distal end to engulf voluminous food 

 particles; macronucleus oval to spherical; a micronucleus; fresh wa- 

 ter. One species. 



C. infundibulifera H. (Fig. 374, a). 65/t by 60^; fully extended ten- 



