522 PROTOZOOLOGY 



L. magnus S. (Fig. 239, h). Extended about 700/^ long; dark 

 brown; 12-20 or more Mliller's vesicles in a row along dorsal 

 border; standing pond water. 



Genus Remanella Kahl. Similar to Loxodes in general appear- 

 ance; but with endoskeleton consisting of 12-20/x long spindle- 

 form needles lying below ciliated broad surface in 3-5 longitudinal 

 strings connected with fibrils; Miiller's vesicles (Fig. 30, c) in 

 some, said to be different from those of Loxodes (Kahl); sandy 

 shore of sea. 



R. rugosa K. (Fig. 239, ^, j). 200-300^ long. 



Tribe 3 Hypostomata Schewiakoff 



Without furrow; free-living; conspicuous oral or pharyngeal basket 

 Ciliation complete; dorsal cilia usually less dense than those on 



ventral surface Family 1 Nassulidae 



Ciliation incomplete; dorsal surface without cilia or with a few 

 sensory bristles 



Posterior ventral surface with a style 



Family 2 Dysteriidae (p. 523) 



Without a style Family 3 Chlamidodontidae (p. 525) 



Furrow from anterior end of cytostome; parasitic 



Family 4 Pycnothricidae (p. 528) 



Family 1 Nassulidae Schouteden 



Genus Nassula Ehrenberg. Oval to elongate; ventral surface 

 flat, dorsal surface convex; usually brightly colored, due to food 

 material; cytostome 1/3-1/4 from anterior end; body often bent 

 to left near cytostome; opening of oral basket deep, in a vestibule 

 with a membrane; macronucleus spherical or ovoid, central; 

 a single micronucleus; contractile vacuole large, with accessory 

 vacuoles and opens ventrally through a tubule-pore; fresh or 

 salt water. Many species. 



N. aurea E. (Fig. 240, a). 200-250^ long; fresh and brackish 

 water (Kahl). 



Genus Paranassula Kahl. Similar in general appearance to 

 Nassula; but with preoral and dorsal suture line; longer caudal 

 cilia on dorsal suture; pharyngeal basket not funnel-like, with 

 16-18 trichites; about 75 cihary rows; trichocysts especially in 

 anterior region. 



P. microstoma (Claparede et Lachmann) (Fig. 240, 6). Pellicle 

 roughened by a criss-cross of longitudinal and circular furrows; 

 macronucleus elongate oval, posterior; contractile vacuole near 



