26 THE SHORTER SCIENTIFIC PAPERS 



Length of body 23/a, diameter ISfx, length of pedicle 

 11 -3 Oft, diameter 1.7/>t. Body provided with a thick gel- 

 atinous envelope from which extends extremely fine and 

 rather short pseudopodia. Nucleus oval, situated in the 

 inferior part of the body. Contractile vesicle not known. 

 Color pale yellow, individuals occasionally agglomerated 

 by their bodies into colonies. 



Fresh water, Germany. 



Zacharias placed A. pedatus in a new genus Actino- 

 sphasridium on the basis that it differed from Actino- 

 lophus by possessing, in the encysted condition, plates 

 covering the body. Schaudinn enumerates it among the 

 doubtful species of Actinolophus, while Penard refers it 

 back to Actinosphseridium, at the same time calling at- 

 tention to its remarkable similarity to Nuclearia and to 

 Tokophrya. 



3. A MINUTUS, n. sp. 



Body spherical, diameter lljx including gelatinous 

 envelope approximately Iju thick. Length of pedicle 

 70/i,, diameter 1/x. Extremely fine short pseudopodia of 

 about Ifi in length extend beyond the envelope on all 

 sides. Nucleus suboval situated in the inferior part of 

 the body. Contractile vesicle (?). Base of pedicle (in 

 the form studied) imbedded in a gelatinous mass 10-12/x. 

 in extent containing small algae, etc. 



Gambler, Ohio, U. S. A. 



A single specimen observed Oct. 29, 1904, in sediment 

 from an aquarium jar containing Hydra fusca, the entire 

 contents of the jar having been collected Sept. 13, 1904, 

 in the Kokosing River at Gambier and subsequently cov- 

 ered with a glass plate for the purpose of preventing too 

 rapid evaporation. The form was under observation at 

 intervals during a period of four hours. 



4. A. CAPITATUS, Penard. 1890 A. c. Penard, Jahrb. nassau. Ver., v. 43, 

 p. 16 t. 1 f. 11. 1896 A. c. Schaudinn, Das Tierreich, Heliozoa, Berlin, p. 12. 

 1901 A. p. Sand, Etude monographique sur le groupe des Infusorres tentaculiferes, 

 Ann. Soc. Beige de Microscopic. 1904 A. c. Penard, Les Heliozoaires d'eau douce, 

 Geneva, p. 316. 



Diameter 30/x, length of pedicle 90/x-. Nucleus (?), 

 Contractile vesicle, Pseudopodia few in number, knobbed. 



