532 PROTOZOOLOGY 



Ciliation not uniform 



Cytostome occupies the entire anterior end; 



cilia only in anterior region 



Family 13 Cyathodiniidae (p. 544) 



Cytostome not terminal; tufts of cilia above 



and below cytostome and in posterior 



region 



Family 14 Blepharocoridae (p. 544) 



Family 1 Marynidae Poche 



Genus Maryna Gruber. Peristome makes a complete circle, 

 thus the cone is entirely separated from anterior edge of body; 

 cytostome left ventral, elongate slit; ridge also with a slit; gelat- 

 inous lorica, dichotomous. 



M. socialis G. (Fig. 243, a, b). About 150m long; in infusion 

 made from long-dried mud. 



Genus Mycterothrix Lauterborn (Tnchorhynchus Balbiani). 

 Anterior cone continuous on dorsal side with body ridge; hence 

 free edge of body only on ventral side; no ventral slit. 



M. erlangeri L. (Fig. 243, c). Nearly spherical with zoochlorel- 

 lae; 50-55^ by 40-50)u; fresh water. 



Family 2 Trichopelmidae Kahl 



Genus Trichopelma Lavender. Compressed; surface with longi- 

 tudinal furrows, seen as lines in end-view; coarse ciliation 

 throughout; cytostome toward left edge about 1/3 from the 

 anterior end; cytopharynx tubular; macronucleus spheroid, 

 central ; 2 contractile vacuoles ; fresh water. 



T. sphagnetorum (L.) (Fig. 243, d). 25-40^ long; in fresh water. 



Genus Pseudomicrothorax Mermod {Craspedothorax Sond- 

 heim). More or less compressed; cytostome opens in anterior half 

 toward left side, in a depression surrounded by ciliary rows ; body 

 surface marked with a broad longitudinal ridge with cross stria- 

 tion; furrows canal-like; cilia on ventral side; cytopharynx 

 tubular, with elastic rods; fresh water. 



P. agilis M. (Fig. 243, e, /). Ellipsoid; 48-58m long; in fresh 

 water. 



Genus Drepanomonas Fresenius (Drepanoceras Stein). Highly 

 flattened; aboral surface convex; oral surface flat or concave; 

 with a few deep longitudinal furrows; ciliation sparse; cytostome 

 and a small cytopharynx simple, near the middle of body; fresh 

 water. Several species. 



