696 PROTOZOOLOGY 



Family 1 Dendrosomidae Biitschli 



Genus Dendrosoma Ehrenberg. Dendritic; often large; nucleus 

 band-form, branched; numerous contractile vacuoles; fresh water. 



D. radians E. (Fig. 327, a). Brownish; 1.2-2.5 mm. high; on vege- 

 tation. 



Genus Trichophrya Claparede and Lachmann. Body small; 

 rounded or elongate, but variable; without stalk; tentacles in 

 fascicles, not branching; endogenous multiple budding; fresh or 

 salt water. 



T. epistylidis C. and L. (T. sinuosa Stokes) (Fig. 327, h). Form 

 irregular; with many fascicles of tentacles; nucleus band-form, 

 curved; numerous vacuoles; up to 240^ long; on Epistylis, etc., in 

 fresh water. 



T. salparum Entz (Fig. 327, c). On various tunicates such as 

 Molgula manhattensis; 40-60^ long; tentacles in 2 groups; salt water; 

 Woods Hole (Calkins). 



T. columbiae Wailes (Fig. 327, d). 60-75m by 40-48/x in diameter; 

 cylindrical; tentacles at ends; nucleus spherical; in marine plankton; 

 Vancouver (Wailes). 



T. micro-pteri Davis. Body elongate, irregular or rounded; up to 

 30-40m long by 10-12/i; fully extended tentacles 10-12;u long; cyto- 

 plasm often filled with yellow to orange spherules; a single micro- 

 nucleus; a single contractile vacuole; attached to the gill of small 

 mouth black bass, Micropterus dolomieu. Davis (1942) states that 

 when abundantly present, the suctorian may cause serious injury to 

 the host. 



Genus Astrophrya Awerinzew. Stellate; central portion drawn out 

 into 8 elongate processes, each with a fascicle of tentacles; body cov- 

 ered by sand grains and other objects. One species. 



A. arenaria A. (Fig. 327, e). 145-188^ in diameter; processes 80- 

 190ai long; in Volga river plankton. 



Genus Lernaeophrya Perez. Body large; with numerous short pro- 

 longations, bearing very long multifasciculate tentacles; nucleus 

 branched; brackish water. One species. 



L. capitata P. (Fig. 327, /). Attached to the hydrozoan, Cordy- 

 lophora lacustris in brackish water; 400-500^ long; tentacles 400^ 

 long. 



Genus Dendrosomides Collin. Branched body similar to Dendro- 

 soma, but with a peduncle; reproduction by budding of vermicular 

 form; salt water. One species. 



D. paguri C. (Fig. 327, g). 200-300^ long; vermicular forms 350/i 

 long; on the crabs, Eupagurus excavatus and E. cuanensis. 



