8UCT0RIA 641 



R. palpans C. (Fig. 290, h). S5/j. by SO^u; tentacles retractile, 

 10-200ai long; stalk 20/x by lO/i; 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 water. One species. 



C. infundibulifera H. (Fig. 291, a). Q5ij. by 60m; fully extended 

 tentacles 200^ long; on Cyclops ornatus. 



Genus Rhyncheta Zenker. Protoplasmic body attached directly 

 to an aquatic animal; with a long mobile tentacle bearing a 

 sucker at its end. 



R. cyclopum Z. (Fig. 291, h, c). About 170^ long; on Cyclops. 



Family 7 Ephelotidae Sand 



Genus Ephelota Wright. Without lorica; stalk stout, often 

 striated; suctorial and prehensile tentacles distributed; macro- 

 nucleus usually elongate, curved; on hydroids, bryozoans, algae, 

 etc.; salt water. Numerous species. 



E. gemmipara Hertwig (Fig. 291, d). About 250^ by 220^; 

 stalk up to 1.5 mm. long; on hydroids, bryozoans, etc. 



E. coronata Kent (Fig. 291, e). Flattened; 90-200^ long; stalk 

 longitudinally striated (Kent); on hydroids, bryozoans, algae, 

 etc. 



E. plana Wailes (Fig. 291, /). 150-320^ by 100-150/i; stalk 

 100/i-l mm. long; on bryozoans; Vancouver. 



Genus Podocyathus Kent. Differ from Ephelota in having con- 

 spicuous lorica; salt water. One species. 



P. diadema K. (Fig. 291, g). Lorica about 42^ long; on bryo- 

 zoans, hydrozoans, etc. 



References 



Collin, B. 1912 Etudes monographique sur les Acinetiens. 



Arch. zool. exper. et gen.. Vol. 51. 

 Kahl, a. 1934 Sudoria. Grimpe's Die Tierwelt der Nord- und 



Ost-see. Part 26. Leipzig. 

 Kent, S. 1881-1882 A manual of the Infusoria. Vol. 2. 

 Wailes, G. H. 1928 Dinoflagellates and Protozoa from British 



Columbia. Vancouver Museum Notes, Vol. 3. 



