CNIDOSPORIDIA, MYXOSPORIDIA, ACTINOMYXIDIA 307 



out distinct processes at the base of the pyramid. Rare. In the 

 urinary bladder of marine fish. Three species. 



Myxoproteus cordiformis Davis (Fig. 130, i). In the urinary 

 bladder of Chaetodipteriis faber. The spore measures 12 microns 

 long by 10 to 11 microns wide. 



Genus Wardia Kudo. Spores isosceles triangle with two 

 convex sides; oval in profile. Two large polar capsules. Tissue 

 parasites of freshwater fish. Two species. 



Wardia ovinocua Kudo (Fig. 130, j)- Ir^ the ovary of Lepo- 

 mis humilis. The spore measures 9 to 11 microns in sutural di- 

 ameter by 10 to 12 microns in width. 



Fig. 130 a. Ceratomyxa mesospora, a fresh spore. X500 (After Davis). 



b-h. Leptotheca ohlmacheri. c-h, X750. (After Kudo), b, section 

 through a uriniferous tubule of Rana pipiens, showing the 

 trophozoites in its lumen (X400); c, a trophozoite containing an 

 endogenous gemmule; d, e, trophozoites, each containing two 

 spores, from life; f, stained trophozoite with two spores; g, a spore 

 with extruded polar filaments; h, surface view of a fresh spore. 

 i. A spore of Myxoproteus cordiformis. X500 (After Davis), 

 j. A spore of Wardia ovinocua. X665 (After Kudo), 

 k. A fresh and a stained spore of Mitraspora elongata. X500 (After 

 Kudo). 



Genus Mitraspora Fujita. Spores circular or ovoidal in 

 front view; somewhat flattened in profile. Two polar capsules; 

 shell longitudinally striated; with or without posterior fila- 

 ments. In the kidneys of freshwater fishes. This genus appar- 

 ently includes border-line forms between this and the other sub- 

 orders. Three species. 



