1885.] Some New Infusoria, 437 
advances across the field of view, stopping at any collection of 
débris in its path, examining it for food and departing with sud- 
den turns and reversals of its course. The appearance of a pha- 
ryngeal tract is here more clearly defined than in the other spe- 
cies, and the infusorian is by far the largest of those hitherto ob- 
serv 
Notosolenus (Solenotus) sinuatus, sp. nov.—Body pee broadly and irregu- 
larly ovate or subtriangular, somewhat longer than broad, widest posteriorly, grad- 
ually tapering through the posterior two-thirds, thence tanidi narrowing to the 
rounded frontal margin, the lateral borders frequently concave or undulate, the pos- 
terior extremity truncate, more or less emarginate; dorsal depression narrow, deep, 
with an anterior keel-like elevation; ventral surface smoothly convex; long flagel- 
lum vibratile at its distal end only, somewhat less than twice as long as the body, 
held stiffly and obliquely in advance towards the right-hand side; short or trailing 
flagellum about one-half as long as the body, usually extending obliquely backward 
toward the right-hand border; nucleus apparently single, spherical and near the 
center of the left-hand side, the contractile vesicle in front, and near the beii 
margin; endoplasm colorless, Etir gerig enclosing granules and green 
particles. Length of bo B 114z, greatest width inch. Habitat: standing 
water, with dead lea 
When the wi of fungi and bacteria on the water was near 
its height, a Paramcecium appeared in profusion. It seems to be 
a distinct species, and one that can scarcely be mistaken for any 
known form, except possibly for P. dursarta (Ehr.) S. K., differing 
from the latter, however, conspicuously in form, especially in the 
apparently oblique curvature of the anterior extremity, in the 
absence of the truncation of the same part, the absence of the 
rapid and continuous circulation of the endoplasmic contents, 
and particularly the green coloration of the cortex and sarcode. 
The oral aperture of the form I have named Paramecium trichium 
is at the posterior extremity of the deep 
adoral fossa which gives the front part the 
appearance of being folded toward the left, 
and is followed by a distinct, ciliated pha- 
rynx (Fig, 4). The two contractile vesicles, 
instead of being placed one in each body- 
half, as in P dursaria, are here anterior and 
close together, contracting quickly, the one 
beginning to reform almost before the com- yg gS Fig. 5. 
pletion of the other’s systole. Trichocysts igen a 
are very abundant, and are so arranged % x yom Fic. 5. r Tricho- 
that they seem to elevate the cuticular sur- cyst. 
face into the minute apse cara bosses that cover the entire 
