64 ILLINOIS BIOLOGICAL MONOGRAPHS [302 



Vegetative form: Pyriform, tapering gradually toward the posterior 

 end, which usually terminates in a long, slender process; colorless and 

 transparent. Progressive movements rapid. Endoplasm granular, the 

 granules being more abundant at the anterior end. The average size of 

 full-grown individuals: SO/x by \2>n. Disporous, 



Spore: Elliptical in front view; fusiform in side view. Sutural plane 

 slightly oblique to the longest diameter, the line forming a marked ridge. 

 Polar capsules open on opposite sides of the spore. Sporoplasm finely 

 granular, confined to the central part of spore. Dimensions : sutural diame- 

 ter 9n, breadth 16ju, polar capsule 4.5/x long, length of polar filament 30jLt. 



LEPTOTHECA SCISSURA Davis 

 [Fig. 13] 

 1917 Leptotheca scisstira Davis 1917 : 222 



Habitat: Gall-bladder of Dasybatis hastatus and Pteroplatea maclura 

 Le Sue; Beaufort (July, August). 



Vegetative form: Young form elongated, with long attenuated posterior 

 process; usually slightly constricted just posterior to rounded anterior end, 

 which bears numerous long, filiform pseudopodia. Progressive movement 

 rapid. Ectoplasm distinguishable at the anterior end. Endoplasm usually 

 filled with small, clear, colorless spherules, which become larger and 

 yellowish as the body increases in size. Each spherule contains one to 

 several dark-brown granules, which increase in size and number and finally 

 collect in an irregular clump at the centre of spherule. The larger indi- 

 viduals are usually flattened dorso-ventrally. The posterior end is divided 

 into long slender processes, presenting sometimes a network caused by the 

 fusion of two or more adjacent processes. Full-grown forms: length 125 to 

 150/i, breadth 20 to 25/i. The longest observed, 195/i by 16/i. Disporous. 



Spore: Elliptical in front view; somewhat flattened along the posterior 

 side. Sutural line distinct and at right angles to the longest diameter. 

 Polar capsules have foramina at some distance from the capsular margin. 

 Sporoplasm finely granular, nearly filling both valves. Dimensions: 

 sutural diameter llju, breadth 22/z, diameter of polar capsule 4/i. 



LEPTOTHECA LOBOSA Davis 

 [Fig. 14] 

 1917 Leptotheca lobosa Davis 1917 : 223 



Habitat: Urinary bladder of Paralichthys dentatus L.; Beaufort (July), 



Vegetative form: Usually spherical which may form a large rounded 



pseudopodium composed of ectoplasm. Body colorless and transparent 



to translucent. Ameboid movements very slow. Ectoplasm contains 



coarse granules, which are of uniform size and very distinct. Endoplasm 



