r,;?S PROTOZOOLOGY 



A. tentaculata Root (Fig. 289, g, h). Lorica 187ai high; stalk 

 287/z long; largo tentacles u]) to 500/x long; body about 138/i by 

 100m; on Ohelia commissuralis and 0. geniculata; Woods Hole. 



Genus Tachyblaston Martin. Lorica with short stalk; tentacles 

 distributed on anterior surface; nucleus oval; salt water. One 

 species. 



T. ephelotensis M. (Fig. 289, i,j). Lorica 30-93^ high; stalk 20- 

 30/1 long; attached to Ephelota gerrmiipara. 



Genus Dactylophrya Collin. Cup-like lorica, filled with the 

 protoplasmic body; with a short stalk; 12-15 arm-like tentacles 

 from anterior surface; salt water. One species. 



D. roscovita C. (Fig. 289, k). About 40/i long excluding stalk; 

 on the hydrozoan, Diphasia attenuata. 



Genus Pseudogemma Collin. Attached with a short stalk to 

 larger suctorians; without tentacles; endogenous budding; 

 swarmer with 4 ciliary bands ; salt water. 



P. pachystyla C. (Fig. 290, a). About 30/^ long; stalk 3-4/z 

 wide; swarmer 15;u by 9ju; on Acineta tuber osa. 



Genus Endosphaera Engelmann. Spherical; without lorica; 

 without tentacles; budding endogenous; swarmer with 3 equa- 

 torial ciliary bands; parasitic in Peritricha; fresh and salt 

 water. 



E. engehnanni Entz (Fig. 290, 6). 15-41)U in diameter; im- 

 bedded in the host's cytoplasm; swarmer 13-1 9/i in diameter; in 

 Opisthoneda henneguyi (p. 618), and other peritrichs. 



Genus Allantosoma Gassovsky. With neither lorica nor stalk; 

 elongate; one or more tentacles at ends; macronucleus oval or 

 spherical; compact micronucleus; a single contractile vacuole; 

 cytoplasm often filled with small spheroidal bodies; development 

 unknown; in mammalian intestine. 



A. intestinalis G. (Fig. 290, c). 33-60/x by 18-37^; attached to 

 various ciliates occurring in caecum and colon of horse. 



A. dicorniger Hsiung (Fig. 290, d). 20-33/i by 10-20ai; un- 

 attached; in colon of horse. 



A. hrevicorniger H. (Fig. 290, e). 23-36^ by 7-1 l/i; attached to 

 various ciliates of caecum and colon of horse. 



Family 6 Discophryidae Collin 



Genus Discophrya Lachmann. Elongate; a short stout pedicel 

 with a plate; tentacles evenly distributed on anterior surface or 



