528 PROTOZOOLOGY 



bladder of Bufo terrestris, Rana pipiens, R. clamitans and R. spheno- 

 cephala; in the United States. Trophozoites up to 6.5 by 1.8 mm., 

 extremely thin; cytoplasm highly alveolated; endogenous budding; 

 disporoblastic; polysporous. Spores 16-18m by 9/x; shell-valve with 

 2-4 longitudinal and 10-13 transverse ridges. 



M. kudoi Meglitsch. In gall-bladder of Ictalurus furcatus; troph- 

 ozoites large disc-like up to 1 mm. in diameter; spores 8.5-12^ long 

 by 4-6m. 



Genus Sphaeromyxa Thelohan. Spore fusiform, but ends usually 

 truncate; polar filament short, thick; trophozoites large, discoid; 

 coelozoic in marine fish. Several species. 



S. halhianii T. (Figs. 68, e; 252, g-i). In gall-bladder of Motella 

 and other marine fish in Europe and of Siphostoma in the United 

 States; spores 15-20m by 5-6//. 



S. sabrazesi Laveran and Mesnil (Figs. 244; 245; 252, j-l). In gall- 

 bladder of Hippocampus, Motella, etc.; spores 22-28m by 3-4)u. 



Genus Zschokkella Auerbach. Spore semi-circular in front view; 

 fusiform in profile; circular in cross-section; ends pointed obliquely; 

 polar capsules large, spherical; sutural line usually in S-form, coelo- 

 zoic in fish or amphibians. A few species. 



Z. hildae A. (Fig. 252, m, n). In urinary bladder of Gadus spp.; 

 spores 16-29/x by 13-18m. 



Family 2 Coccomyxidae Leger and Hesse 



Spore ellipsoidal; one polar capsule at one end; circular in cross- 

 section; undoubtedly a border-line form between Myxosporidia and 

 Microsporidia. 



Genus Coccomyxa Leger and Hesse. Polar filament long, fine; 

 coelozoic parasite in marine fish. 



C. morovi L. and H. (Fig. 252, o-t). In the gall-bladder of Clupea 

 pilchardus) ; spores 14jLt by 5-6iu. 



Family 3 Mjrxosomatidae Poche 



Two or 4 polar capsules at anterior end; sporoplasm without any 

 iodinophilous vacuoles. 



Genus M3rxosoma Thelohan {Lentospora Plehn). Spore circular, 

 oval or ellipsoid in front view, lenticular in profile; 2 polar capsules 

 at anterior end; histozoic in marine or fresh water fish. Several 

 species. 



M. catostomi Kudo (Figs. 57; 243). In the muscle and connective 

 tissue of Catostomus commersonii; spores 13-15/x by 10-11. 5jli. 



