1897.] MICROSCOPICAL JOURNAL. 117 



Famil3^ — Anisoueuiidsp. S. K. 



Genus. — Anisouema. Dujardin. 



Species. — Anisonema disomata (figs. 10 and 11). 



Body sub-elliptical, less than twice as long as wide ; 

 anterior extremity slightly wider than the posterior, and 

 narrowly truncate centrally ; posterior rounded ; dorsum 

 and ventrum flat and both traversed longitudinally by a 

 deep groove which occupies nearly one-third of the body 

 width ; these grooves seem to cut the body in equal 

 halves ; flagella originating together near the frontal 

 border and on a line with the slight anterior truncation ; 

 the anterior one equals one body length while the pos- 

 terior one is near two body lengths; contractile vesicles, 

 two, small and located in the anterior body third, one 

 on each side of the grooves; nucleus roundish, in the pos- 

 terior half near the sinistral border ; endoplasm granular 

 and of a greenish tint ; locomotion exactly as with Anin- 

 nema grande. Ehr. Size 4-1666 inch. Habitat — water 

 from a flower pot. 



This form was taken in fairly large quantities from 

 water of long standing in a flower pot exposed to the 

 weather. The grooves give to the infusorian a very 

 transparent line extending the full length of the body. 

 It is when the anterior is depressed and there is a c;on- 

 sequent elevation of the posterior border that these 

 grooves can be well observed. The lateral borders of 

 this form are not rounded, but instead are cut ofl' at 

 right angles to the dorsum and ventrum (fig. 11). 



The reseml)lance that this form bears to the Anisonema 

 solenotus of Dr. Stokes is striking and apart from its 

 smaller size would require careful scrutiny to distinguish. 

 The writer has on numerous occasions taken the Aniso- 

 nema solenotus of Dr. Stokes from pond water in the 

 Audubon park in New Orleans and has thus been enabled 

 to compare them. 



{To he contiriued.) 



