429] STUDIES ON MYXOSPORIDIA—KUDO 191 



35(36) Shell thickened at posterior margin; spore 12 to ISy. long, 4 to 6.8^ broad, polar 

 capsule 5.5 to7juby2.1 to2.5/i 



Myxobolus anurus Cohn 1895 (142) 



36(35) Shell of uniform thickness; spore 14 . 3n long, 6.7|x broad, polar capsule 6.5/* by 2/t 



Myxobolus funduli Kudo 1919 (ISl) 



37(32) Breadth of spore greater than half of length 38 



38(41) Length of spore greater than 20 ft 39 



39(40) Spore large; subcircular and anterior end flattened in front view; sutural edge 

 with markings; length 38 to 45 ju, breadth 32 to 38^1, thickness 28 to35A(, polar 

 capsule 15 to 17/i long 



Myxobolus magnus Awerinzew 1913 (ISO) 



40(39) Spore small; extremities equally rounded; length 21/*, breadth 15/i, polar capsule 

 6n long 



Myxobolus cyprini Doflein 1898 (143) 



41(38) Length of spore less than 20/t 42 



42(43) Spore with a wide (2 to Zn) membraneous posterior process; length 12/x, breadth 

 10/i, length of polar capsule 4.5/t 



Myxobolus cordis Keysselitz 1908 (148) 



43(42) Normal spore without appendage 44 



44(49) Breadth of sutural ridge one-third of thickness of spore 45 



45(46) Length of spore smaller than 10/t; subcircular in front view;*length 7 to 8/*, 

 breadth 6 to 7/x, thickness 5/x 



Myxobolus globosus Gurley 1893 (139) 



46(45) Length of spore greater than 10/* 47 



47(48) Spore large; elliptical in front view; with an intercapsular appendix, sutural edge 

 with markings; length 16.9 to 21.6/*, breadth 13 to 16.2/*, thickness 9/* 



Myxobolus gigas Auerbach 1906 (145) 



48(47) Spore small; subcircular in front view; markings on entire sutural edge; 

 length 10.8 to 11.7/*, breadth 9.9 to 10.4/*, thickness 7.2 to 9/* 



Myxobolus aeglefini Auerbach 1906 (144) 



49(44) Sutural ridge narrower 50 



50(69) Spore with an intercapsular appendix 51 



51(68) Intercapsular appendix triangular 52 



52(57) Anterior end of spore attenuated in front view 53 



53(54) Sutural edge without marking; length 11 to 12/*, breadth 9.25 to 10.5/i 



Myxobolus balleri Reuss 1906 (147) 



54(53) Sutural edge with markings 55 



55(56) Spore small; length 8 to 9 . 5/*, breadth 6 to 7 . 5/*, thickness 5.5/* 



Myxobolus exiguus Thelohan 1895 (1^) 



56(55) Spore large; often subcircular; length 1 1 . 5/t to 12/*, breadth 7 . 5 to 8/*, thickness 

 5/x 



Myxobolus obesus Gurley 1893 (140) 



57(52) Anterior end of spore broadly rounded in front view > 58 



58(59) Posterior portion of spore narrower; polar capsule rather large; length 11.4 to 

 13.5/*, breadth 9.5 to U/t, thickness 8.5 to 9.5/*, polar capsule 5.5 to 6/* long 



Myxobolus discrepans Kudo 1919 (156) 



59(58) Extremities of spore approximately equal 60 



60(61) Sutural edge without markings; spore 10 to 10.5/* long, 8 to 8.5/* broad, polar 

 capsule 4.5/* long 



Myxobolus squamae Keysselitz 1908 (147) 



61(60) Sutural edge with markings 62 



62(65) Markings distinct 63 



Numbers enclosed in parentheses refer to the page of the article on which is found the description of the species 

 named. 



