A CNIDOSPORIDIA 33 1 



Genus Urosporidium Caullery and Mesnil. Similar to Haplo- 

 sporidium, but the spheroidal spore with a long projection. 



Urosporidium fuliginosum Caullery and Mesnil (Fig. 143, 

 h, i). In the body cavity of the polychaete, Syllis gracilis. Not 

 common. 



Genus Anurosporidium Caullery and Chappellier. Similar to 

 Haplosporidium, but the operculate spore is spherical. 



Anurosporidium pelseneeri Caullery and Chappellier. In 

 the sporocyst of a trematode parasitic in Donax trunculus. 

 Schizogony intracellular; the cysts extracellular. The spore is 

 small, about 5 microns long. 



Genus Bertramia Caullery and Mesnil. Parasitic in aquatic 

 worms and rotifers. Sausage-shaped bodies occur in the body 

 cavity of the host. The spherical spores which develop in 

 them, possess a uninucleate sporoplasm and a well-developed 

 membrane. 



Bertramia asperospora (Fritsch) (Fig. 143, j, k). Parasitic 

 in the body cavity of rotifers (Brachionus, Asplanchna, Syn- 

 chaeta, Hydatina, etc.). Fully grown vermicular body measures 

 70 to 90 microns and contains 80 to 150 spores. 



Bertramia capitellae Caullery and Mesnil. Parasitic in the 

 annelid, Capitella capitata. Spore very small; 2.5 microns in 

 diameter. 



Bertramia euchlanis Konsuloff. In the body cavity of the 

 rotifier, belonging to the genus Euchlanis. 



Genus Ichthyosporidium Caullery and Mesnil. Parasitic 

 in fish. Often looked upon as Microsporidia, as the organism 

 develops into large bodies in the body muscles, connective 

 tissue, or gills, which appear as conspicuous "cysts." The latter 

 are surrounded by a thick wall and contain numerous spores. 



Ichthyosporidium giganteum (Thelohan) (Fig. 142). In the 

 various organs of Crenilabrus melops and C. ocellatus. The cysts 

 vary 30 microns to 2 mm. in diameter. The spore measures 

 5 to 8 microns long. 



Ichthyosporidium hertwigi Swarczewsky. In Crenilabrus 

 paro. The organism produces cysts which measure 3 to 4 mm. 

 in diameter on the gills of the host fish. The spore measures 6 

 microns long. 



Genus Coelosporidium Mesnil and Marchoux. Parasitic 



