THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



Vol. XVIII. MAY, 1897. No. 5 



Notes on Some New, or Presumably New, Infusoria. 



By J. C. SMITH, 



NEW ORLEANS, LA. 



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



Family. — AnisonemidfB. S. K. 



Genus. — Entosiplion, Stien. 



Species. — Entosiplion'emarginata. (fig. 12.) 

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

 terior extremity slightly emarginate and flexed towards 

 the ventrum; posterior extremity obtusely pointed; 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; flagella 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 subcentral; endoplasm bluish and granu- 

 lar in posterior body half; locomotion as Bntosiphon 

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

 with algae. Longitudinal fission. 



This minute specimen of the genus resembles very, 

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

 the resemblance goes no further. Tha pharyngeal tube 

 is protusile and this is made very apparent when this 



