new Infusoria from American Fresh Waters. 101 



no way attached ; flagella projecting considerably beyond the 

 lorica mouth, widely diverging ; colour bands yellow, laterally 

 placed ; contractile vesicle single or double, minute, posteriorly 

 located. Length of lorica 2^Vt7 inch. 



Hah. Freshwater, attached to filamentous Algse. Gre- 

 garious. 



Chrysojpyxis dispar^ sp. nov. (PI. I. fig. 6 and 6 a.) 



Lorica urceolate, once and a half to twice as long as broad, 

 widest anteriorly, tapering posteriorly to a subacute point of 

 attachment, the lateral borders then nearly straight ; or the 

 body of the lorica subspherical, tapering, and constricted poste- 

 riorly ; both forms narrowed anteriorly to produce a straight, 

 more or less conspicuous neck-like prolongation ; a curved 

 partition extending transversely across the lorica near the 

 centre, and dividing its cavity into two unequal parts ; animal- 

 cule subspheroidal, not attached to the lorica, but supported 

 by the transverse partition ; colour bands yellow, lateral. 

 Length of lorica i-gVo" to jtott inch. 



Hah. Freshwater, on confervoid Algse, in company with 

 the preceding. 



Urotricha platystomaj sp. nov. (PL I. fig. 7.) 

 Body oval or somewhat obovate, less than twice as long as 

 broad, subcylindrical, entirely ciliate, the cilia vibrating irre- 

 gularly and independently, shortest and least numerous on the 

 posterior border ; cuticular surface conspicuously ornamented 

 by minute hemispherical elevations arranged in longitudinal 

 series ; oral aperture apical, the margins slightly protruding, 

 giving it a pouting aspect ; posterior springing hair shorter 

 than the body, obliquely directed, its distal extremity usually 

 curved ; contractile vesicle single, spherical, near the lateral 

 border of the posterior extremity ; anal aperture postero- 

 tej-minal near the pulsating vacuole. Length of body -^(^ inch. 

 Hah. Standing water, with Sphagnum ; movements rota- 

 tory and leaping by means of the posterior seta. Rej^roduc- 

 tion by transverse fission. 



The oral aperture is enormously expansile. An individual 

 has been seen attempting to engulf the empty lorica of Trach- 

 elomonas volvocina^ Ehr., expanding the oral orifice to an 

 extent nearly equalling the diameter of the spherical shell. 

 The position of the anal aperture has not been previously ob- 

 served in the species of this genus. 



Tillina campyla^ sp. nov. (PI. I. fig. 8.) 

 Body elongate-ovate, entirely ciliate, soft, flexible, about 

 three times as long as broad, widest and rounded posteriorly. 



