DINOFLAGELLATA 



255 



Genus Apodinium Chatton. Young individuals elongate, spherical 

 or pyriform; binucleate; adult colorless; formation of numerous 

 swarmers in adult stage is peculiar in that lower of the 2 individuals 

 formed at each division secretes a new envelope, and delays its 



Fig. 109. a, Blastodinium spinulosiwi, X240 (Chatton); b, c, Oodi- 

 nium poucheti (c, a swarmer) (Chatton); d, e, Apodinium inycetoides 

 (d, swarmer-formation, X450; e, a younger stage, X 640) (Chatton); 

 f, Chytriodiniiim parasiticum in a copepod egg (Dogiel) ; g, Trypanodinium 

 ovicola, X1070 (Chatton); h, Duboscqella tintinnicola (Duboscq and 

 Collin); i, j, Haplozoon clymenellae (i, mature colony, X300; j, a swarmer, 

 X1340) (Shumway); k, Syndinium turbo, X1340 (Chatton); 1, Paradi- 

 niuni poucheti, X800 (Chatton); m, Ellobiopsis chattoni on Calanus fin- 

 mar chicus (CauUery); n, Paraellobiopsis coutieri (Collin). 



