SPOROZOA, GREGARINIDA 

 f 



559 



Fig. 238. a-f, Porospora gigantea (Hatt). a, a cephalin attached to 

 Homarus gut, X1250; b, gymnospores; c, d, developing sporozoites 

 in mollusc; e, sporozoites enveloped by phagocyte; f, a sporozoite, 

 X2250. g-n, Nematopsis legeri (Hatt). g, h, trophozoites in Eriphia; 

 i, associated trophozoites attached to gut-epithelium, X1250; j, gym- 

 nospores ;k, gymnospores after entering molluscanbody; 1, a young sporo- 

 zoite, X2250; m, cyst in mollusc with six spores; n, germination of a 

 spore in Eriphia gut, X1250. 



Duboscq) (Fig. 238, g-n). Sporadins in a crustacean, Eriphia spini- 

 frons, in linear or bifurcated syzygy 75-7 50 m long; cysts about 80 m 

 in diameter; gymnospores 7/x in diameter, composed of fewer, but 

 larger merozoites; permanent spores with a distinct one-piece shell 

 (endospore) and a less conspicuous epispore, about 14-15ju long and 

 circular in cross-section, develop in numerous species of molluscan 



