564 



PROTOZOOLOGY 



Fig. 256. a, Eupoterion pernix, X670 (MacLennan and Connell); 

 b, Ancislrina ovata, XS40 (Cheissin); c, Ancistrella choanomphali, 

 X840 (Cheissin); d, Boveria teredinidi, X550 (Pickard); e, Plagiospira 

 crinita, X740 (Issel); f, Hemispeira asteriasi, X940 (Wallengren) ; 

 g, h, Hypocoma acinetamm, X400 (Collin); i-k, H. patellarum 

 (i, j, X820; k, X670) (Lichtenstein). 



macronucleus single or divided into as many as 7 parts; a micro- 

 nucleus; commensal. 



A. choanomphali C. (Fig. 256, c). 55-90m by 18-20/^; in mantle 

 cavity of Choanomphalus sp. 



Genus Ancistrospira Chatton et Lwoff. Ciliation meridional to 

 spiral; peristome right spiral; commensal. 



