100 ILLINOIS BIOLOGICAL MONOGRAPHS [338 



Genus SPHAEROSPORA Thelohan 

 1892 Sphaerospora Th61ohan 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 Th61ohan 1895 : 339-340 



1912 Sphaerospora divergens Parisi 1912 : 289 



1912 sphaerospora divergens Auerbach 1912 : 41-42 



Habitat: Urinary tubules of kidney of Blennius phoUs L., Crenilabrus 

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

 Hmandoides; 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: 65/i by 55/*, 

 60)u by 25/x, 60ju by 20/i, 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 

 10/i by 12/x, the larger diameter coinciding with sutural plane, thickness 

 Bn (Auerbach), polar capsules about 4/li long, length of polar filament 

 20 to 25m. 



SPHAEROSPORA ELEGANS Thelohan 

 [Figs. 187 and 188] 



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

 urinary bladder of Gasterosieus aculeatus L., G. pungitus L., Loia vulgaris 

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



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

 25/Lt in diameter. Protoplasm homogeneous, very finely granular, contains 

 numerous refractive globules, probably of fatty nature. Pseudopodia 

 lobose. Movements slow. Disporous. 



*Misprinted as Sphaeromyxa elegans. 



