HOLOTRICHA 559 



C . fusiformis (C.) (Fig. 254,/). Striation spiral; peristome about 

 1/6 the body length; a few cilia at posterior end; oval macronu- 

 cleus central; contractile vacuole posterior; about GO/i long; in 

 fresh water. 



C. caeci Powers (Fig. 254, g). About 32-92^t long; in intestine 

 of Triyneustes esculentus and other echinoids; Tortugas. 



Family 5 Philasteridae Kahl 



Genus Philaster Fabre-Domergue {Philasterides Kahl). Body 

 cyhndrical; peristome about 1/3-2/5 the body length, broader 

 near cytostome and with a series of longer cilia; cytostome with 

 a triangular membrane; cytopharynx (?); ciliation uniform; a 

 caudal seta; trichocysts; oval macronucleus with a micronucleus 

 in middle ; contractile vacuole terminal or central ; in salt or fresh 

 water. 



P. digitiforniis F.-D. (Fig. 254, h). Anterior region bent dor- 

 sally; contractile vacuole terminal; 100-150/x long; salt water. 



P. armata (K.) (Fig. 254, i). Anterior end more or less straight; 

 peristome difficult to see; contractile vacuole central; 70-80)u 

 long; fresh water. 



Genus Helicostoma Cohn. Similar to Philaster in general ap- 

 pearance; preoral side-pouch curved around posterior edge of 

 peristome and separated from it by a refractile curved band; 

 with or without pigment spot near cytostome; macronucleus oval 

 or band-form ; contractile vacuole terminal ; in salt water. 



H. huddenhrocki Kahl (Fig. 254, j). 130-200/i long; in salt and 

 brackish water. 



References 



IvAHL, A. 1931 Urtiere oder Protozoa. In Dahl's Die Tierwelt 



Deutschlands., Part 21. 

 NoLAND, L. E. 1937 Observations on marine ciliates of the Gulf 



coast of Florida. Trans. Amer. Micr. Soc, Vol. 56. 

 Wenrich, D. H. 1929 Observation on some freshwater ciliates. 



I. Teutophrys trisula Chatton and de Beauchamp and 



Stokesia vernalis n.sp. Ibid., Vol. 48. 



