782 PROTOZOOLOGY 



Genus Insignicoma Kozloff. Elongate pyriform; a contractile ten- 

 tacle with internal canalicule; median ciliary rows on anterior half 

 of ventral surface; two right ciliary rows; left rows short and closely 

 set; an inverted V-shaped row of long cilia on left-lateral surface at 

 about the middle of body; on mollusks. 



/. venusta K. (Fig. 331, d). 42-52/* by 18-21/1 by 15-18/z; 15 me- 

 dian, two right, and 16-17 left ciliary rows; macronucleus ovoid; mi- 

 cronucleus spherical; on the gills and palps of Botula californiensis 

 (Kozloff, 1946a). 



Genus Raabella Chatton and Lwoff. Three groups of ciliary rows; 

 eight to 11 short median rows; six to 11 longer rows on left-lateral 

 side; two longer rows on the right side; on mollusks. 



R. botulae (Kozloff) (Fig. 331, e). 31-39/* by 14-17/x by 12-14/x; 11 

 median rows; 11 closely set left rows; two longer right rows; macro- 

 nucleus ovoid to sausage-shaped; spherical micronucleus; on the 

 gills and palps of Botula californiensis (Kozloff, 1946a). 



Genus Crebricoma Kozloff. Pyriform; anterior suctorial tentacle; 

 many ciliary rows, the majority of which are closely set; two long 

 rows on the right side; anterior terminals of the rows make a V- 

 shaped suture; on the gills of mollusks. 



C. kozloffi Chatton and Lwoff (C. carinata K.) (Fig. 331, /). Body 

 58-71// by 27-39/x by 22-3 l/i; two ciliary rows on right side long, 

 about 2/3 the body length; more than 30 rows of closely set cilia 

 (1/2-2/3 the body length and longer toward left); macronucleus el- 

 lipsoid; on the gills and palps of Mytilus edulis (Kozloff, 1946; Chat- 

 ton and Lwoff, 1950). 



Genus Hypocomides Chatton and Lwoff. Elongate; some 23 cili- 

 ary rows; about 20 median rows, short; two longer rows on right; a 

 short curved row near the posterior end; on mollusks. 



H. mediolariae C. and L. (Fig. 332, a). 27-50/t by 15-27/*; on the 

 gills of Mediolaria marmorata (Chatton and Lwoff, 1922). 



Genus Anisocomides Chatton and Lwoff. Body ovoid, slightly 

 flattened; 12 ciliary rows; two short median rows with five additional 

 rows which are progressively longer toward left; a short oblique row, 

 posterior to the outermost left row; four right rows much longer; on 

 the gills of mollusks. 



A. zyrpheae (C. and L.) (Fig. 332, b). 19-38 M by 10-1 5/x by 7-10 M ; 

 on the gills of Pholas (Zyrphea) crispata (Chatton and Lwoff, 1926). 



Genus Hypocomatidium Jarocki and Raabe. Similar to Aniso- 

 comides, but without the short posterior ciliary row; on the gills of 

 mollusks. 



