170 ILLINOIS BIOLOGICAL MONOGRAPHS [408 



Spore: Oval with slightly attenuated anterior end; posterior end 

 tapering into tails, which end in one point or bifurcated; asymmetrical in 

 shape, one valve is more curved than the other. This asymmetry of the 

 shell-valves in profile enables the present species to be distinguished from 

 other species. Shell striated longitudinally. Two polar capsules pyriform 

 and well developed, reaching to the middle of the spore. Sporoplasm with 

 a round iodinophilous vacuole. Dimensions: total length 38 to 48/i, 

 length of the cavity of the spore 15ju, breadth 6 to 7.5/i, polar capsules 7.5 

 to 9/i by 3 to 3.5;i, length of polar filament 50/*. 



HENNEGUYA NEAPOLITANA Parisi 

 [Figs. 544 and 545] 



1912 Henneguya neapolitana Parisi 1912 : 297-298 



Habitat: Connective tissue of the renal tubule of kidney of Box sal pa 

 C. et v.; Napoli (August). 



Vegetative form: Small cyst (40 to 50/i in diameter) surrounded by 

 thin membrane, containing a number of spores, numerous pigment granules 

 and coarse yellowish globules. 



Spore: Oval, slightly flattened. Anterior end rounded when seen from 

 the front, but attenuated in profile. Shell tapering into a long fine tail 

 posteriorly. The fine distal portion of the tail wraps around the thicker 

 part. Two polar capsules, pyriform, occupying the anterior half of the 

 cavity of the spore, cross each other when seen from the front. Sporoplasm 

 finely granular with two nuclei, the iodinophilous vacuole being hardly 

 visible. Dimensions: total length 50 to 60/i, length of the cavity of spore 

 8.5 to 9.5/i, breadth 8.5 to 9.5/1, internal breadth 6.3 to 7/i, thickness 8/i, 

 polar capsules 4.7 to 5.5/i by 3/i. 



HENNEGUYA WISCONSINENSIS Mavor et Strasser 



[Figs. 558 and 559] 



1916 Henneguya wisconsinensis Mavor et Strasser 1916 : 676-682 



Habitat: Urinary bladder of Perca ffavescens; Lake Mendota, Wiscon- 

 sin (April). 



Vegetative form: Trophozoites are usually elongated and have the 

 general form and shape of a Umax ameba. It may reach a size of 300/i by 

 70/i. Clear differentiation of ectoplasm and endoplasm. Pseudopodia 

 lobose. Two spores are formed in each pansporoblast. Polysporous. 



Spore: Ovoid, bilaterally symmetrical, and have a bifurcated caudal 

 process. Two polar capsules at anterior end. Coiled polar filament visible 

 in vivo (5 windings). Dimensions: length excluding tail 11.5/t, breadth 

 7/t, tail 9.6/i, polar capsules 3.5/t by 2.5/x, length of filament 33fj.. 



