THE AM ERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL 



Vol. XVIII. MAY, 1897. No. 5 



Notes on Some New, or Fresuraabiy New. Infusoria. 



Bv J. C. SMITH. 



NEW ORLEANS, I,A. 



(Contiuued from Page 117 of last Month's Journal.) 



Family. — Anisonemidju. S. K. 



Genus. — Entosi{)hou. Stien. 



Species. — Entosiphoii emarginata. (tig. 12.) 

 Body subobovate; less than twice as long as wide; an- 

 terior extremity sli<;lit]y emarginate and flexed towards 

 the ventrum; posterior extremity obtusely i)ointed; the 

 right hand half of the anterior border slightly concave; 

 dorsum convex and smooth; ventrum plane; oval aperture 

 at apex of anterior emargination; pharyngeal tube exten- 

 ding in a median line from the oval aperture through two 

 thirds of the body length; Hagella originating together 

 and to the right of the oval aperture; the anterior one 

 equal to one body length and the posterior one to two 

 body lengths; contractile vesicle conspicuous and located 

 in the anterior half just below the dextral concavity; nuc- 

 leus round and subceutral; endoplasm bluish and granu- 

 lar in posterior body half; locomotion as Entosij)hon 

 sulcatus. Duj. Size 1-1833 inch. Habitat — Pond water 

 with algse. Longitudinal fission. 



This minute specimen of the genus resembles very 

 much in outline the Anisonema pusilla of Dr. Stokes, but 

 the resemblance goes no further. Th^ pharyngeal tube 

 is protusile and this is made very apparent when the 



