100 ILLINOIS BIOLOGICAL MONOGRAPHS [338 



Genus SPHAEROSPORA Thelohan 

 1892 Sphaerospora Thelohan 1892 : 167 



The characters of the genus are described on page 57. 

 Type species: Sphaerospora diver gens Thelohan. 



SPHAEROSPORA DIVERGENS Thelohan 



[Figs. 183 to 186] 



1895 Sphaerospora divergens Thelohan 1895 : 339-340 



1912 Sphaerospora divergens Parisi 1912 : 289 



1912 Sphaerospora divergens Auerbach 1912 : 41-42 



Habitat: Urinary tubules of kidney of Blennius pholis L., Crenilahriis 

 melops L., C. pavo Cuv. et V, and urinary bladder of Hippoglossoides 

 lint and oides; Concarneau, Roscoff, Napoli (July), Smalfjorden. 



Vegetative form: Rounded discoidal or spherical or more or less 

 elongate. Ectoplasm transparent, without real pseudopodium. Move- 

 ments extremely slow. Endoplasm, granular, contains fat globules and 

 small yellowish granules. Size of sporulating individuals: 65ju by 55/n, 

 60/i by 25m, 60^ by 20^, etc. Polysporous (Thelohan); monosporous, and 

 disporous (Auerbach). 



Spore: Spherical. Shell with fine striations. Two polar capsules 

 divergent; coiled polar filament visible in fresh state. Sporoplasm fills the 

 extracapsular cavity of the spore. Dimensions: lO/x in diameter, often 

 lO/u by 12m, the larger diameter coinciding with sutural plane, thickness 

 8/x (Auerbach), polar capsules about 4m long, length of polar filament 

 20 to 25m. 



SPHAEROSPORA ELEGANS Thelohan 



[Figs. 187 and 188] 



1890 



1892 Sphaerospora elegans 



1894 Chloromyxum (Sphaerospora) 



elegans 



1895 Sphaerospora elegans 

 1909 Sphaerospora elegans* 

 1912 Sphaerospora elegans 



Habitat: Renal tubules of kidney, connective tissue of ovary and 

 urinary bladder of Gasterosteus aculeatus L., G. pungitus L., Lota vulgaris 

 Cuv., Phoxinus laevis L.; Paris, Bretagne, Karlsruhe, Lake Garda. 



Vegetative form: Rounded or slightly elongated, not exceeding 20 to 

 25m in diameter. Protoplasm homogeneous, very finely granular, contains 

 numerous refractive globules, probably of fatty nature. Pseudopodia 

 lobose. Movements slow. Disporous. 



*!Misprinted as Sphaeromyxa elegans. 



