365] STUDIES ON MYXOSPORIDIA—KUDO 127 



preserved in formalin than in fresh condition. Two polar capsules of same 

 size, are situated asymmetrically, opening at the side near the anterior 

 end. Sporoplasm granular and with two nuclei, but without any iodino- 

 philous vacuole. The polar filament not being extruded by ordinary 

 reagents, probably because the spores were not full-grown. Dimensions: 

 length 10 to llju, breadth 6.5 to 7/x, length of polar capsules S/x. 



LENTOSPORA ACUTA (Fujita) Kudo 



[Figs. 360 to 362] 



1912 Sphaerospora acuta Fujita 1912 : 260-261 



Habitat: Epithelium of branchial lamellae of Carassius auratus L.; 

 Sapporo, Nippon. 



Vegetative form: Fujita's description is simply as follows: Sporoblast 

 contains about two spores. 



Spore: Spherical in front view, with slightly pointed anterior end; 

 spindle shaped in side-views. Shell thin and smooth. Two convergent 

 polar capsules are of different sizes, occupying about 5/8 in space of the 

 spore. No vacuole could be made out in sporoplasm. Dimensions: 

 length 8 to lO/x, breadth 7 to 8fx, thickness 5 to 6/;, polar capsules 5/i by 4)u. 



Remarks: This species, recorded incompletely by Fujita as Sphaero- 

 spora, shows characters of the genus Lentospora in spore form so that it 

 is provisionally placed here. 



LENTOSPORA DERMATOBIA Ishii 

 [Figs. 594 to 596] 

 1916 Lentospora dermatobia Ishii 1916 : 472-474 



Habitat: In the integument of Anguilla japonica Temm. et SchL; 

 Shizuoka, Nippon, From the same specimen which harboured Myxidium 

 c«gMi7/ae, see page 114. The number of cysts reaches probably "several 

 hundreds." 



Vegetative form: Cysts, beneath the epidermis, usually subcircular, 

 more or less irregularly triangular or quadrilateral under the magnifier, 

 with the largest diameter of from 142 to 267)U. The epidermis is slightly 

 lifted up by the cyst. No chromatophore on the surface of the cyst. The 

 cysts separated from each other, are found mostly in the central region of 

 the body, head and fins being free from cysts. In cross-section, cysts 

 exhibit oval or lenticular shape with the longest diameter, which is twice 

 as long as the depth, placed parallel to the surface of the skin. No partic- 

 ular pathological change was noticed. 



Spore: Circular in front view; broad fusiform or lenticular in side view. 

 Sutural ridge fairly distinct. Sutural edge comparatively broad, especially 



