154 JOURNAL OF THE [JunC, 



iiles, discs or spherules. A Vorticella described by the writer 

 under the name of V. smaragdina is so tinted, the ectoplasm, and 

 apparently the endoplasm as well, being translucent and homo- 

 geneous. 



The following is the description of the Infusorian referred to. 

 It is shown in Fig. i, under an amplification of about one 

 hundred and sixty-five diameters. 



LeucopJirys emarginata, sp. nov. (Figs, i and 2). 



Body pouch-shaped, depressed, about one and one-half times 

 as long as broad, soft and flexible but persistent in form, the 

 extremities subequal in width, the dorsal surface convex, the 

 ventral flattened ; the posterior extremity obliquely rounded, 

 conspicuously emarginate at the left-hand side of the median 

 line, the anterior obliquely truncate, deeply concave, the angles 

 rounded, the right-hand border considerably prolonged beyond 

 the frontal margin, the left-hand body-margin slightly flattened, 

 the right-hand one convex ; cuticular surface obliquely striate, 

 minutely roughened ; cuticular cilia fine, arranged in oblique 

 longitudinal rows, those of the posterior extremity supplemented 

 by numerous, longer, less rapidly vibrating hairs ; peristome- 

 field wide, deep, confined to the anterior third of the ventral 

 surface, broadest anteriorly, the apical extremity rounded and 

 curved toward the right-hand side, the dextral border straight, 

 occasionally somewhat concave, overarching the deeply and 

 laterally excavated peristome-field ; oral aperture capacious, 

 broadly ovate ; endoplasm crowded with green, apparently disci- 

 form, chlorophyll corpuscles arranged somewhat regularly in 

 oblique longitudinal lines ; contractile vesicle single, spherical, 

 postero-terminal, on the left-hand side of the median line ; 

 nucleus long, band-like, convolute, placed in the anterior body- 

 half ; anal aperture large, in close proximity to the contractile 

 vesicle. Length of body xKirth of an inch. Habitat : marsh 

 water, with Sphagfium. 



The longer supplementary hairs clothing the posterior extrem- 

 ity and restricted to it, are from two to three times longer than 

 those of the general surface. They appear to originate from the 

 posterior striations, as do the shorter ones, and to have a less 

 rapid and more independent movement. 



Trenton, N. J. 



