562 



PROTOZOOLOGY 



■^.<-TTTmS^^ 



Fig. 255. a, Conchophthirus anodontae, X400 (Kidder); b, C. 

 caryoclada, X270 (Kidder); c, Myxophyllum steenstrupi, X370 

 (Raabe); d, e, Ancistruma mytili, X670 (Kidder); f, A. isseli, X670 

 (Kidder). 



the bottom of cytopharynx; numerous ciliary rows; about llO^i 

 by 40^t; on gills of Macoma (Tellina) halthica. 



Family 3 Ancistrumidae Issel 



Genus Ancistruma Strand (Ancistrum Maupas). Ovoid, pyri- 

 form or somewhat irregular; flattened; right side with more 

 numerous large ciha than the left; peristome on right side; cyto- 



