HOLOTRICHA 



627 



A. ovata C. (Fig. 295, h). 38-48m by 15-20^; in the mantle cavity of 

 molluscs: Benedictia hiacalensis, B. limneoides and Choanomphalus 

 sp. 



Fig. 295. a, Eupoterion pernix, X670 (MacLennan and Connell); 

 b, Ancistrina ovata, X840 (Cheissin); c, Ancistrella choanomphali, X840 

 (Cheissin); d, Boveria teredinidi, X550 (Pickard); e, Plagiospira crinita, 

 X740 (Issel); f, Hendspeira asteriasi, X940 (Wallengren) ; g, h, Hypo- 

 coma acinetarum, X400 (Collin); i-k, H. patellarum (i, j, X820; k, X670) 

 (Lichtenstein). 



Genus Ancistrella Cheissin. Elongate; ends rounded; ventral sur- 

 face less convex than dorsal surface; 16-17 longitudinal ciliary rows; 

 ciliation uniform, except anterior-dorsal region, bearing bristle-like 



