SPOROZOA, GREGARINIDA 



537 



heterochaeta (Costa Rica); trophozoites 40-45/x in diameter; nucleus 

 ovoid, large, 12/x in diameter. 



Genus Beccaricystis M. Mature trophozoites elongate, cylindrical, 

 with a sucker-like depression at anterior end; nucleus at its bottom, 

 one species. 



B. loriai M. (Fig. 230, a). In seminal vesicles of Pheretima ser- 

 mowaiana; trophozoites cylindrical, with wart-like growths, myo- 



Fig. 230. a, Beccaricystis loriai, X570 (Cognetti); b, c, Schaudinnella 

 henleae (b, X885; c, X1000) (Nusbaum); d, e, Diplocystis schneideri 

 (d, Xl4;e, spore, X2000) (Kunstler) ; f , Urospora chiridotae, X200 (Pix- 

 ell-Goodrich); g-i, Gonospora minchini (g, a young trophozoite in host 

 egg; h, a mature trophozoite, X330; i, sporadins in association, X80) 

 (Goodrich and Pixell-Goodrich). 



nemes run lengthwise with radially arranged transverse fibrils ; about 

 lOO/i long. 



Genus Albertisella M. Mature trophozoites cup-shaped, with an- 

 terior sucker with a smooth wall; nucleus at its bottom. One species. 



A. crater C. In seminal vesicles of Pheretima sermowaiana. 



Family 6 Schaudinnellidae Poche 



Parasitic in the digestive system of oligochaetes; spores spherical; 

 trophozoites do not encyst; male trophozoites producing microgam- 



