419J STUDIES ON MYXOSPORIDJA—KUDO 181 



6( 5) Pseudopodia short lobose 7 



7( 8) Extremities of spore attenuated; spore large; sutural diameter 10 to ll/x, breadth 

 90 to 100m 



Ceratomyxa sphaerulosa Thelohan 1892 (66) 



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



39m 



Ceratomyxa streplospora 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 7m, 

 breadth 50m 



Ceratomyxa appendiculata 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 8m, breadth 40 to 50m, lateral process 250 to 300m 



Ceratomyxa acadiensis Mavor 1915 (71) 



13(12) Sutural diameter 5m, breadth 10 to 12m, length of lateral process 20m 



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 6m, 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 (SO) 



20(15) Shell-valve tapering gradually to attenuated point; asymmetrical; 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 -hke form. 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 recurvala Davis 1917 (75) 



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

 sutural line; polar capsules pyriform; 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 enclosed in parentheses refer to the page of the article on which is found the description of the species 

 named. 



