672 PROTOZOOLOGY 



N. aedis K. (Fig. 289, I, m). In the adipose tissue of a larval Aedes 

 aegypti; spores broadly pyriform and measure 7.5-9/u by 4-5^; polar 

 capsule large; uninucleate sporoplasm posterior (Kudo, 1930). 



N. frenzelinae Leger and Duboscq (Fig. 289, n). In the cytoplasm 

 of the cephaline gregarine, Frenzelina conformis, parasitic in the 

 gastric caeca and intestine of Pachygrapsus marmoratus ; spores 

 about 2.8m long; extruded polar filament up to 25/z long (Leger and 

 Duboscq, 1909). 



N. notabilis Kudo (Fig. 289, o-q). In the trophozoite of the myxo- 

 sporidian, Sphacrospo?'a polymorpha (p. 653) which inhabits the uri- 

 nary bladder of Opsanus tau and 0. beta. The host fish remain free 

 from the microsporidian infection. The entire development takes 

 place in the cytoplasm of the host trophozoites. Trophozoites small 

 binucleate, multiply by binary fission. Spores ovoid to ellipsoid; 

 sporoplasm binucleate; fresh spores 2.9-4/z by 1.4-2.5/x; extruded 

 polar filament 45-62//. When heavily infected, the host myxosporid- 

 ian trophozoites degenerate and disintegrate. A unique example of 

 hyperparasitism in which two cnidosporidians are involved (Kudo, 

 1944). 



Genus Glugea Thelohan. Each sporont develops into 2 spores; 

 the infected host cells become extremely hypertrophied, and trans- 

 form themselves into the so-called Glugea cysts (Figs. 287, b; 290, 

 e). Many species (Kudo, 1924b). 



G. anomala (Moniez) (Fig. 290, a-f). In Gasterosteus aculeatus, G. 

 pungitus (sticklebacks) and Gobius minutus; cysts conspicuous, up to 

 about 5 mm. in diameter; host cells are extremely hypertrophied; 

 spores 4-6 m by 2-3 ju. Morphology and sporogony (Stempell, 1904; 

 Weissenberg, 1913; Debaisieux, 1920). 



G. miilleri Pfeiffer. In the muscles of Gammarus pulex and G. 

 locusta; spores 5-6 m by 2-3 ju (Debaisieux, 1919). 



G. hertwigi Weissenberg (Figs. 287, b; 290, g, h). In the smelt, 

 Osmerus mordax and 0. eparlanus. Schrader (1921) found the in- 

 testine the primary site of infection, the cysts varying in size, up to 

 3 mm. in diameter; as the cysts grow in the mucosa, they come to lie 

 immediately under the peritoneum. Spores measure 4-5. 5/x by 2- 

 2.5m- Fantham, Porter and Richardson (1941) found the cysts in the 

 serous membrane of the hind gut; as the spores were 3.5-4.6^ by 

 1.5-2/z, they named the organism Glugea hertwigi var. canadensis. 

 Morphology and spore-formation (Weissenberg, 1911, 1913; Schra- 

 der, 1921). 



Genus Perezia Leger and Duboscq. Each sporont produces 2 



