660 SUMMARY OF CURRENT RESEARCHES RELATING TO 



brown and semi-opaque. Opisthotricha emirginata n. sp. in its move- 

 ments is rapid and erratic. The contractile vesicle expels its contents 

 through the dorsal surface, forming there at complete systole a con- 

 spicuously projecting elevation of the cuticular surface. StylonycMa 

 notophora n. sp. differs from >S^. mytilus Ehr., which it most resembles, 

 in that the extremities are subequal in width, in the rounded posterior 

 margin beyond which project three instead of two anal styles, in the 

 possession of motionless bristle-like hairs on the dorsal surface, and 

 especially in having the opening of the anal orifice on the superior or 

 dorsal aspect. Podophrya brachypoda n. sp. may be recognized by 

 the foot-stalk being very short and inconspicuous ; unless seen in profile 

 or side view, or in longitudinal optic section and attached to the sup- 

 porting object from which it is readily separated, it bears a not remote 

 resemblance to Sphcerophrya. Dr. Stokes suggests that P. Buckei 

 S.K. is probably an immature form of an unobserved, more distinctly 

 pedicellate member of the present genus, and not, as Kent thought, 

 likely hereafter to become the type of a new genus. In Solenophrya 

 inclusa n. sp. the frontal convexity or roof is so hyaline that its 

 existence can bs satisfactorily observed only by the use of some 

 chemical means of removing the enclosed zooid. This is readily 

 accomplished by a drop or two of caustic potash in solution. Dr. 

 Stokes has been unable to detect openings in the upper surface or 

 dome-like roof of the lorica. S. pera n. sp. The form of this lorica 

 is so much like that of the ordinary hand-satchel now popular among 

 ladies that it suggested the specific name. Acineta urceolata n. sp. is 

 the last species described. 



Dr. A. C. Stokes also describes * some new fresh-water Infusoria 

 from the shallow ponds and streams of New Jersey. 



Physomonas vestita n. sp. differs from the hitherto single known 

 member of the genus in the absence of the truncated anterior border, 

 and in the presence of a linear, dark-bordered band or depression near 

 the frontal margin, as exists in Spumella. 



Bicosoeca lepteca n. sp. is among the largest, if not the largest of 

 the genus. It differs widely from the only fresh-water species, 

 B. lacustris J.-Clk., hitherto observed in American lakes. B. lepto- 

 stoma n. sp. most closely resembles the salt-water B. tenuis S.K., 

 and may be considered its fresh-water representative. B. longipes 

 n. sp. Stylohryon Ahhotti n. sp. This polythecium, unlike that of 

 S. petiolatum (Duj.) S.K., which it most resembles, is subject to but 

 little variation in its mode of colony-building. Tillina helia n. sp. 

 has the nucleus placed subcentrally, but its position in reference to 

 any special region is not constant. 



Berepyxis n. gen. is near Stein's Chrysopyxis, but differs in the con- 

 stantly pedicellate character of the lorica. Two new species, 

 D. amphora and B. ollula, are described. Chilomonas ovata n. sp. is 

 the most minute fresh-water species yet recorded. Loxophyllum 

 flexilis n. sp. is remarkably irregular in outline, and this peculiarity 

 is increased by the presence of two little projections, on the posterior 



* Amer. Joum. Sci., xxix. (1885) pp. 313-28 (1 pi). 



