419J STUDIES ON MYXOSPORIDIA—KUDO 181 



6( 5) Pseudopodia short lobose 7 



7( 8) Extremities of spore attenuated; spore large; sutural diameter 10 to 12;*, breadth 

 90 to 100^ 



Ceratomyxa spkaerulosa Thdlohan 1892 (66) 



8( 7) Extremities of spore rounded; spore small; sutural diameter 4/«, breadth 34 to 

 39m 



Ceratomyxa slreptospora Davis 1917 (79) 



9(4) Pseudopodia unlocalized ; from main part of sporulating trophozoite are branched 

 out from one to six long prolongations. Spore: sutural diameter 5 to 7/«, 

 breadth 50^ 



Ceratomyxa a-ppendiculata Thelohan 1892 (67) 



10 ( 3) Sutural diameter equal to or less than one- tenth of total breadth 11 



11(14) Shell-valve terminating in a fine thread-like process at distal end 12 



12(13) Sutural diameter 7 to 8/u, breadth 40 to 50^, lateral process 250 to 300/i 



Ceratomyxa acadiensis Mavor 1915 (71) 



13(12) Sutural diameter Sfi, breadth 10 to 12/i, length of lateral process 20ju 



Ceratomyxa linospora Doflein 1898 (69) 



14(11) Shell-valves not terminating in thread-like processes 15 



15(20) Shell-valve drawn out into a delicate process 16 



16(17) Lateral process ribbon-like; sutural diameter 6ft, breadth 140 to 150m 



Ceratomyxa taenia Davis 1917 (74) 



17(16) Lateral process not ribbon-like, but circular in cross-section 18 



18(19) Posterior margin of main part of spore flattened; sutural diameter 12m, breadth 

 115 to 140m; trophozoite disporous 



Ceratomyxa sphairophora Davis 1917 (73) 



19(18) Posterior margin of main part of spore rounded; sutural diameter 7m, breadth 

 80m. Trophozoite monosporous or disporous 



Ceratomyxa spinosa Davis 1917 (80) 



20(15) Shell-valve tapering gradually to attenuated point; asjoimietrical; sutural diame- 

 ter 9m, breadth 115m 



Ceratomyxa attenuata Davis 1917 (75) 



21( 2) Sutural diameter more than one-eighth of total breadth 22 



22(45) Sutural diameter equal to or more than one-fifth of breadth 23 



23(34) Shell-valves symmetrically built 24 



24(29) Shell-valves attenuated at distal end 25 



25(26) Pseudopodia peculiar network-like foim. Spore: sutural diameter 12 to 20m, 

 breadth 50 to 80m 



Ceratomyxa ramosa Awerinzew 1907 (69) 



26(25) Pseudopodia never unite together 27 



27(28) Shell-valves curved greatly posteriad; polar capsules rounded; sutural diameter 

 8 to 9m, breadth 16(?)m. Trophozoite elongated pyriform. 



Ceratomyxa recurvata Davis 1917 (75) 



28(27) Shell-valves not curved; two thickenings on posterior margin equidistant from 

 sutural line; polar capsules pyrifonn; sutural diameter 40 to 45m, thickness 25 

 to 30m, breadth 124 to 140m 



Ceratomyxa tylosuri Awerinzew 1913 (70) 



29(24) Shell-valve rounded at distal end 30 



30(31) Spore arch-shaped; sutural diameter and thickness 12 to 15m, breadth 50 to 60m. 

 Trophozoite large amoeboid. 



Ceratomyxa spari Awerinzew 1913 (70) 



31(30) Spore straight 32 



Numbers eiiclose(} in parentheses refer to the page of the article on which is found the description of the species 

 named. 



