341] STUDIES ON MYXOSPORIDIA—KUDO 103 



Spore: Spherical, sometimes slightly compressed infero-superiorly. 

 Sutural ridge; on each side are a number of concentric striations extending 

 around each valve parallel to sutural line. Polar capsules pyriform and 

 large. Coiled polar filaments indistinct. Sporoplasm finely granular. 

 Dimensions: diameter 7 to lO^u, (8/i in average), polar capsules 4 to 5/x by 

 2 to 2.5/1. 



SPHAEROSPORA sp. Davis 



1917 Sphaerospora sp. Davis 1917 : 213 



Habitat: Urinary bladder of Lepisosteus platystomus; Gainesville, Fla. 

 Vegetative form: No description. 

 Spore: Not described. 



SPHAEROSPORA sp. Southwell et Prashad 



1918 Sphaerospora sp. Southwell and 



Prashad 1918 : 347-348 



Habitat: Under the scales of Barilius barna; from the vicinity of the 

 Ruby Mines, Burma (June). 



Vegetative form: The cysts occurred in very large numbers, one under 

 each scale. 



Spore: Authors' description: "The poor condition of the material did 

 not allow of a complete account of its structure, but the bicapsulate, 

 rounded structure of its spores places it undoubtedly in the genus Sphaero- 

 spora Thelohan." 



SPHAEROSPORA CARASSII nov. spec. 

 [Figs. 200 to 204] 



Habitat: Gill filament of Carassius carassius L.; Tokio (February). 



Vegetative form: Trophozoites small ameboid in groups or in diffused 

 condition in the connective tissue of the gill filament. No cyst formation. 

 The number of trophozoites in groups is generally small. The largest 

 group found in sections was 96^ by 36fi, the macroscopical examination 

 always failing to trace the parasites. The trophozoites, 10 to 20^ long, 

 with poorly dift'erentiated protoplasm and usually reticular endoplasm 

 without any particular enclosure (Fig. 200). Ameboid movements not 

 observed. Schizogonic multiplication rapid, each of the daughter indivi- 

 duals developing into two spores. Disporous. Other sporous characters 

 could not be determined. 



Spore: Spherical in front and side views, tho form variable to some 

 extent (Figs. 201-203). Shell smooth. Sutural ridge fairly distinct. Two 

 polar capsules, broadly pyriform, of equal size and convergent, located at 



