698 PROTOZOOLOGY 



M. asymmetrica Beers. 115-150/x by 55-70/x; hook 10/i long; shaft 

 25-30/x by 2/x in antero -lateral margin in ectoplasm; 25-30 support- 

 ing fibrils; 2 rows of 4 vacuoles each, which do not contract regularly 

 in vitro; in the intestine (middle third) of Eisenia lonnbergi (Beers, 

 1938). 



Genus Protoradiophrya Rossolimo. Elongate; near anterior end 

 a shallow depression along which is found a spicule which may be 

 split posteriorly. A few species. 



P. fissispicidata Cheissin (Fig. 298, g). 180-350/i long; in the ante- 

 rior portion of intestine of Styloscolex sp. 



Genus Mrazekiella Kijenskij. Elongate; anterior portion broad 

 with sucker-like depression, posterior region cylindrical; anterior 

 end with attaching organella composed of arrowhead and skeletal 

 ribs; macronucleus an elongate band; contractile vacuoles dis- 

 tributed. A few species. 



M. intermedia Cheissin (Fig. 298, h). 180-260/* long; in the anterior 

 portion of intestine of Branchiura coccinea. 



Genus Mesnilella Cepede. Elongate; with one or more long spicules 

 imbedded in endoplasm; contractile vacuoles in 1-2 rows. Numerous 

 species. 



M. rostrata Rossolimo (Fig. 298, i). 100-1200/x long; in the intes- 

 tine of various oligochaetes (Styloscolex, Teleuscolex, Lamprodrilus, 

 Agriodrilus, etc.). 



M. clavata (Leidy) (Fig. 298, j). 100-200/x long; in the intestine of 

 Lumbricus variegatus. 



References 



Beers, C. D.: (1938) Structure and division in the astomatous cili- 



ate Metaradiophrya asymmetrica n. sp. J. Elisha Mitch. Sc. 



Soc, 54:111. 

 Bush, Mildred: (1933) The morphology of the ciliate Haptophrya 



michiganensis, etc. Tr. Am. Micr. Soc, 52:223. 

 Cepede, C.: (1910) Recherches sur les infusoires astomes: etc. Arch. 



zool. exper. g6n., Ser. 5, 3:341. 



— (1923) V, VI. Bull. Soc. Zool. France, 48:105. 

 Cheissin, E.: (1930) Morphologische und systematische Studien 



ueber Astomata aus dem Baikalsee. Arch. Protist., 70:531. 

 Conklin, C: (1930) Anoplophrya marylandensis, etc. Biol. Bull., 



58:176. 

 Delphy, Jean: (1936) Sur les Anoplophryimorphes. III. Bull. Mus. 



Nat. d'hist. nat., 8:516. 

 Faure-Fremiet, E.: (1950) Morphologie compared et systematique 



des cilies. Bull. soc. zool. France, 75:109. 

 Heidenreich, E.: (1935) Untersuchungen an parasitischen Ciliaten 



aus Anneliden. I, II. Arch. Protist., 84:315. 



