QOQ PROTOZOOLOGY 



K. acrohates H. (Fig. 274, c). 100-200ju long; soil infusion. 



Genus Uroleptus Ehrenberg. Elongate body drawn out into a 

 tail-like portion, 3 frontals; 2-4 rows of ventral cirri; marginals; 

 no anals; sometimes rose- or violet-colored; fresh or salt water. 

 Many species. 



U. limnetis Stokes (Fig. 274, d). About 200/x long; fresh water 

 among vegetation. 



U. longicaudatus S. (Fig. 274, e). About 200/li long; marsh water 

 with sphagnum. 



U. dispar S. (Fig. 274, /). 150-170^ long; fresh water. 



U. halseyi Calkins (Fig. 276, a). About 160/x by 20/1 ; peristome 

 1/6-1/7 the body length; 3 ventrals; macronucleus divided into 

 many (up to 26) parts; 2 (1-3) large macronuclei; fresh water. 



Genus Uroleptopsis Kahl. Ventrals in 2 uninterrupted rows; 

 salt water. A few species. 



U. citrina K. (Fig. 274, g). Elongate; flexible; ectoplasm with 

 pale-yellow ringed bodies which give the organism yellowish 

 color; marginals discontinuous posteriorly; 2 contractile vacuoles 

 near left border; nucleus distributed (?); 150-250^ long; salt 

 water. 



Genus Strongylidium Sterki. 2-5 ventral rows of cirri, margi- 

 nals spirally arranged; 3-6 frontals; 2-many macronuclei; fresh 

 or salt water. Many species. 



8. calif ornicum Kahl (Fig. 274, h). 4-5 frontals; macronuclei 

 about 30 in number; 4 micronuclei; contractile vacuole with short 

 canals; about 250yu long; fresh water among vegetation. 



Genus Stichotricha Perty. Slender ovoid or fusiform; peristome- 

 bearing part narrowed; not flexible; usually 4 spiral rows of cirri; 

 sometimes tube-dwelling, and then in groups ; fresh or salt water. 

 Many species. 



aS. secunda P. (Fig. 274, i). 130-200^ long; in fresh water. 



Genus Chaetospira Lachmann. Similar to Stichotricha; but 

 peristome-bearing part flexible; fresh or salt water. 



C. midleri L. 150-250/x long; in lorica; fresh water. 



Genus Urostyla Ehrenberg. Ellipsoid; flexible; ends rounded; 

 flattened ventral surface with 4-10 rows of small cirri and 2 

 marginal rows; 3 or more frontals; 5-12 anals; macronucleus a 

 single body or in many parts; fresh or salt water. Numerous 

 species. 



