568 PROTOZOOLOGY 



(Idyaea furcata) •?(:, 

 Phoront //y^>A \ >\ -'V^ Young trophont 



(Cladonema radiatum) 



Fig. 257. Diagramjillustrating the life-cycle of Spirophrya 

 subparasitica (Chatton and Lwoff). 



Actinia mesemhryanthemum, A. equina, Anemonia sulcata and 

 other actinozoans in European waters; Chatton and Lwoff found 

 Metridium marginatum, Sagartia leucolena and Astrangia danae 

 of Woods Hole free from this cihate. 



Genus Spirophrya Chatton et Lwoff. Trophonts ovoid, pointed 

 anteriorly; 16 uninterrupted ciUary rows of which striae 1 and 2 



