HOLOTRICHA 725 



L. setigerum Quennerstedt (Fig. 309, e). 100-350/* long; average 

 150/* by 60m; form variable; 1-4 macro nuclei; several contractile 

 vacuoles in a row; salt and brackish water. Morphology (Sauerbrey, 

 1928). 



Genus Bryophyllum Kahl. Similar to Loxophyllum; but uniformly 

 ciliated on both broad surfaces; ventral ridge with closely arranged 

 trichocysts, extends to the posterior extremity and ends there or 

 may continue on to the opposite side for some distance; macro nu- 

 cleus ovoid to coiled bandform; in mosses. Species (Gelei, 1933). 



B. vorax (Stokes) (Fig. 309,/). Elongate; tricho cyst-bearing ven- 

 tral ridge turns up a little on dorsal side; contractile vacuole pos- 

 terior; macro nucleus oval; 130/* long; in fresh water among sphag- 

 num. 



Genus Centrophorella Kahl ( Kentrophoros Sauerbrey). Extremely 

 elongate, nematode-like; anterior end greatly attenuated; posterior 

 end pointed; body surface longitudinally striated; ciliation uniform; 

 1-3 macronuclei; numerous contractile vacuoles in 2 rows; cytostome 

 not observed. 



C. fasciolalum (S.) (Fig. 309, g, h). About 270+t by 38/*. Noland 

 (1937) observed 2 specimens in sediment taken from sandy bottom in 

 Florida; contracted 650/* long; extended 1 mm. long. 



C. lanceolata Faure-Fremiet. Ribbon-like; 460-520/* by 40 /*; ven- 

 tral side ciliated; dorsal side covered with dark sulphur bacteria 

 (Caulobacteria), except the extremities; five to six spherical micro- 

 nuclei, about 4/* in diameter; on sandy flat of Cape Cod (Faure- 

 Fremiet, 1951). 



Family 2 Tracheliidae Kent 



Genus Trachelius Schrank. Oval to spherical; anterior end drawn 

 out into a relatively short finger-like process or a snout; posterior 

 end rounded; round cytostome at base of neck; cyto pharynx with 

 trichites; contractile vacuoles many; macro nucleus simple or band- 

 form; fresh water. 



T. ovum Ehrenberg (Fig. 310, a). Spheroidal to ellipsoid; right side 

 flattened and with a longitudinal groove; left side convex; proboscis 

 about 1/4-1/2 the body length; cilia short and closely set; numerous 

 contractile vacuoles; macronucleus short sausage-form, often di- 

 vided into spherules; endo plasm penetrated by branching cytoplas- 

 mic skeins or bands and often with numerous small brown excretion 

 granules; 200-400/* long; fresh water. 



Genus Dileptus Dujardin. Elongate; snout or neck-like prolonga- 

 tion conspicuous; somewhat bent dorsally; along convex ventral side 



