HOLOTRICHA 



791 



Genus Gymnodinioides Minkiewicz (Physophaga Percy; Oospira 

 Chatton and Lwoff). Trophonts twisted along equatorial plane; gen- 

 erally 9 ciliary rows, in some a ruclimentar}^ row between striae 5 and 

 6 at anterior end. Many species. 



G. calkinsi Chatton and Lwoff. Phoronts on gills and trophonts 

 in the moult of Palaemonetes sp. ; Woods Hole. 



Genus Phoretrophrya Chatton and Lwoff. Trophonts generally 

 with 9 ciliary rows; striae 1, 2, and 3, close to one another. One spe- 

 cies. 



Fig. 336. a, Foettingeria actiniarum, a trophont; b,Spirophrya subpara- 

 sitica, a trophont, XlOOO; c, Phoretrophyra nebaliae, X1180; d, Syno- 

 phrya hypertrophica (Chatton and Lwoff). 



