THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



Vol. XVIII. APRIL, 1897. No. 4 



Notes on Some New, or Presumably New, Infusoria. — I. 



By J. C. SMITH, of 



NEW ORLEANS, LA. 

 [WITH KRONTISPIECK ! 



The classification followed in this paper is thatadoiited 

 by Saville Kent in his "Manual of the Infusoria." 

 Family. — Actinomonadida3. S. K. 

 Genus. — Actinomonas. S. K. 

 Species. —Actinomonas primus (figs. 1, 2, and 3). 



Body in active flagellate stage cylindrical, varial le in 

 form, usually obovate with the posterior continued as a 

 caudal prolongation, sometimes ovale and at other times 

 irregular in shape and nodulate; the largest and usual 

 obovate form about twice as long as wide; flagellum sin- 

 j.'le anterior, equalling one longest body length and 

 vibratile through its whole extent; contractile vesicle 

 conspicuous and located in posterior body half; nucleus 

 round and subcentral; endoplasm liyaline containing to a 

 greater or lesser extent, a number of bead-like granules 

 of a blueish tint, presumably food; locomotion equable, 

 fairly ra})id and by revolution on long axis. 



Size 1-125(J incli. Habitat — Infusion of aquatic plants. 



Body in Heliozoaii stage variable in form, usually sub- 

 globose and undergoing slight changes of contour; rays 

 numerous, tine and projected from all parts of the 

 peripliery; ecpialling in length from one t(> two diameters 

 of the zooid; flagellum quiescent and coiled close to the 

 body. 



