566 PROTOZOOT.OGY 



Family 5 Hypocomidae Biitschli 



Genus Hypocoma Gruber. Cilia confined, or reduced, to hold- 

 fast organella at anterior end, arranged in longitudinal rows; with 

 a sucking tentacle which probably serves for obtaining nourish- 

 ment; cytostome apparently vestigial; commensal. The genus has 

 been placed in Suctoria; but Chatton and Lwoff showed that 

 ciHation is lengthwise and not crosswise as in Suctoria. 



H. acinetarum Collin (Fig. 256, g, h). On Acineta papillifera. 



H. patellar mn Lichtenstein (Fig. 256, i-k). On gills of Patella 

 caerulea; about 30/^ long. 



H. cardii Chatton et Lwoff. On Cardium edule. 



Genus Hypocomides Chatton et Lwoff. Ovate; slightly flat- 

 tened; anterior end attenuated, a few meridional striae; adoral 

 rows reduced; commensal in mussels. 



H. zyrphaeae C. et L. 25-30;u by 12-15^; in gills of Zyrphaea 

 crispata. 



References 



Chatton, E. and A. Lwoff 1926 Diagnoses de cilies thigmo- 



triches nouveaux. Bull, soc, zool. Fr., Vol. 5L 

 Cheissin, E. 1931 Infusorien Ancistridae und Boveridae aus 



dem Baikalsee. Arch. f. Protistenk., Vol. 73. 

 Kahl, a., 1931, 1935 Dahl's Die Tierwalt Deutschlands. Parts 



21, 30. 

 Kidder, G. W., 1933 Studies on Conchophthirus myiili De 



Morgan. I, II. Arch. f. Protistenk., Vol. 79. 

 1933 On the genus Ancistruma Strand (Ancistrum 



Maupas). I. Biol. Bull. Vol. 64; II. Arch. f. Protistenk., Vol. 



81. 



1934 Studies on the ciliates from freshwater mussels. I, 



II. Biol. Bull., Vol. 66. 

 MacLennan, R. F. and F. H. Connell 1931 The morphology 



of Eupoterion pernix gen. nov., sp. nov. Uni. Calif. Publ. 



Zool., Vol. 36. 

 Stevens, N. M. 1903 Further studies on the ciliate Infusoria, 



Licnophora and Boveria. Arch. f. Protistenk., Vol. 3. 



