377) STUDIES ON MYXOSPORIDIA—KUDO 139 



MYXOBOLUS GLOBOSUS Gurley 

 [Figs. 409 and 410] 



1893 Myxoholus globosus Gurley 1893 : 415 



1894 Myxobolus globosus Gixrley 1894 : 241 



Habitat: Branchial lamellae of Erimyzon sucetta ohlongus Lac. (Catos- 

 tomus tuberculatus Le Sueur); Kinston (N.C.), Columbia, (S.C., March), 

 tributaries of Fox River. 



Vegetative form: Cysts, whitish, elongated elliptical or rod-shaped, 

 surrounded by very thin membrane? Size up to 0.5mm. in max. length. 

 PolysporoUs. 



Spore: Globose, subcircular in outline. Shell thin and very transparent. 

 Sutural ridge very wide, being one third of the thickness of the spore. 

 Polar capsules two, of equal size, divergent. Vacuole present, but not 

 clearly contoured. Dimensions: length 7 to 8jw, breadth 6 to 7/t, thickness 



MYXOBOLUS OBLONGUS Gurley 



[Figs. 412 to 416] 



1841 Miiller 1841 : 487-490 



1893 Myxobolus oblongus Gurley 1893 : 414 



1894 Myxobolus oblongus Gurley 1894 : 234^38 



Habitat: Beneath the skin, chiefly of the head of Erimyzon sucetta 

 ohlongus Lac. {Catostomus tuberculatus Le Sueur); Kinston, tributaries 

 of Fox River. 



Vegetative form: Cysts, round or elliptic, not over 1mm. in diameter, 

 covered by resistant membrane. Color whitish. Polysporous. 



Spore: Spatular, approaching roundish-oblong. Shell thin and trans- 

 parent. Sutural ridge wide. Two polar capsules, pyriform, of equal size. 

 Sporoplasm extending forward along the upper surface. Vacuole could not 

 be detected. Dimensions: length 14 to 17/i, breadth 8.5/x, thickness 5 

 to 6/i. 



MYXOBOLUS TRANSOVALIS Gurley 

 [Figs. 417 and 418] 



1893 Myxobolus transovalis Gurley 1893 : 415 



1894 Myxobolus transovalis Gurley 1894 : 242 



Habitat: Under scales on external surface of Phoxinus (Clinostomus) 

 funduloides Girard; 4 Mile Run, Carlius, Va., tributary of Potomac River 

 (June), No fish of the same species caught from the same locality on 

 August 29 of the same year was found infected. 



Vegetative form: It is not certain whether cysts exist or not. Spores 

 in mass, appear to be held together by a small gelatinous or mucoid mass 



