HOLOTRICHA 635 



approximately that of Ophiurespira; massive macro micleus; with 

 peculiar trichocysts comparable with the nematocysts of Polykrikos 

 (p. 257) ; ecto- or endo -parasitic in encysted stages of other aposto- 

 means. Several species. 



P. insidiosa C. and L. (Fig. 298, b). Phoronts, trophonts and 

 tomites in phoronts of Gymnodinioides. 



Genus Polyspira Minkiewicz. Trophonts reniform; 9 rows and 

 several extra rows; striae 1-4 and 5-9 with 2 others in 2 bands. 



P. delagei M. (Fig. 299, a). Phoronts on gills and trophonts in the 

 moult of Eupagurus berhardus. 



Genus Pericaryon Chatton. Trophonts ellipsoid; 14 ciliary rows. 



P. cesticola C. (Fig. 298, d). Trophonts in the gastro vascular cavity 

 of the ctenophore, Cestus veneris; other stages unknown. 



Genus Calospira Chatton and Lwoff. Trophonts resemble those 

 of Spirophrya; 20 ciliary rows; macro nucleus twisted band-form; a 

 micronucleus. 



C. minkiewiczi C. and L. (Fig. 299, b). Phoronts attached to in- 

 tegument of Harpacticus gracilis (copepod); trophonts in its fresh 

 carcass; tomonts and tomites in water. 



Genus Vampyrophrya Chatton and Lwoff. Trophonts ovoid; 10 

 ciliary rows, of which striae 308 are uninterrupted. One species. 



V. pelagica C. and L. (Fig. 298, c; 299, c). Phoronts on Paracala- 

 nus parvus, Clausocalanus furcatus, etc., and trophonts in their 

 fresh carcasses. 



Genus Traumatiophtora Chatton and Lwoff. Trophonts oval; 11 

 ciliary rows. One species. 



T. punctata C. and L. (Fig. 299, d). Trophonts in fresh carcass of 

 Acartia clausi. 



Genus Hyalospira Miyashita. Trophonts in the moult of a fresh- 

 water crustacean, with a contractile vacuole and a long accessory 

 canal, and with a band-shaped macro nucleus; protomont encysts in 

 narrow crevices; tomont divides into 2-16 tomites; tomite with a 

 tubular macro nucleus, two ciliated grooves on ventral side, and 9 

 ciliary rows; phoront cysts occur on the body hairs of Xiphocaridina 

 to metamorphose into trophont. 



H. caridinae M. Fully grown trophonts 80-120^ long; phoronts 

 and phoront cysts present in fresh moults and body hairs respect- 

 ively of Xiphocaridina compressa. 



References 



Chatton, E. and A. Lwoff 1935 Les cih^s apostomes. Arch. zool. 



exp. et gen., Vol. 77. 

 Miyashita, Y. 1933 Studies on a freshwater foettingeriid ciliate, 



Hyalospira caridinae n.g., n.sp. Japan. Jour. Zool., Vol. 4. 



