AOTINOPHEYS. 43 



Body sphencai, invested with silicious glo- PAaB . 



bules ; pseudopods few, not granular, Hyalolampe, 49 

 Body within a spherical, latticed capsule, with 



a stem, Clathrultna, 50 



DESCRIPTION OF GENERA AND SPECIES. 

 GENUS I. ACTINOPHRYS. 



Body soft, spherical, composed of hyaline, colorless, 

 pale and finely granular protoplasm, with mingled coarser 

 granules and minute oil-like molecules, more or less 

 crowded with large, clear vesicles or vacuoles. Nucleus 

 central, ordinarily obscured. A large contractile vesicle 

 at the periphery. Pseudopods numerous, projecting as 

 exceedingly delicate, tapering rays, or finely granular 

 extensions of the protoplasm of the surface ; not branch- 

 ing. 



Sol. SYN. : Trichoda sol, Muller, Schrank ; Peri- 

 tricha sol, Bory ; Actinophrys sol, Ehr., Pritchard and others ; A. diffor- 

 mis, Ehr. ; A. Eichornii, Claperide ; A. oculata, Stein. 



Spherical, translucent, vesicular or foamy, vesicles usu- 

 ally uniform ; contractile vesicle single, large, active. 

 Nucleus commonly obscured. Rays numerous, straight ; 

 length 1, 3 or 4 times the diameter of the body. Diameter 

 of body, 40/i to 120^ ; pseudopods, commonly 80^ to 160/z. 



Hob. In quiet waters with aquatic plants. 



A ctinophrys picta. 



Similar to A. sol, but of a bright-green color, owing 

 to the presence of chlorophyll mingled with the proto- 

 plasm. Diameter, 56// to 105//. Not common. 



Hob. Sphagnous swamps. 



