1885.] Infusoria from Fresh Water. 23 
Vorticella utriculus, Sp. nov.—-Body vase-shaped or subpyriform, somewhat 
changeable in shape, twice as long as broad, widest centrally, tapering posteriorly, 
and slightly constricted beneath the everted and revolute border of the peristome, 
whose width is a little less than the greatest breadth of the body; cuticular surface 
strongly and conspicuously striate transversely ; ciliary disk slightly and obliquely 
elevated; vestibular bristle conspicuous; pedicel three times as long as the body; 
contracted zodid obovate or pyriform. Length o dy gis inch. Habitat: At- 
tached to Lemna rootlets in ponds in Western New York. Solitary or scattered. 
Descriptions of several members of one genus must necessa- 
rily contain much repetition wearisome to the general reader. 
The records can be scarcely more than comparisons of contour 
and structure, resemblances and dissimilarities. The habits of 
the numerous kinds of Vorticellz are essentially the same. This 
particular one that I have named the “long-shaped” Vorticella, 
V. macrophya, bears a striking resemblance to V. cucullus From., 
and might justly be identified with that species, were it not for the 
presence of cuticular striz and the absence of the cushion-like 
ciliary disk. 
It is an interesting coincidence that this and two preceding 
forms from the same little pool, although they so widely differ, 
should so uniformly present, when contracted, the small annular 
sheath about the attachment of the pedicel. In every instance 
that portion of the zodid which accompanies the distal end of the 
stem into the body remains included until the animal is otherwise 
almost completely expanded, when that part slips out quite sud- 
denly and so completes the act of dilatation. The Vorticella is 
shown expanded in Fig. 7, magnified 535 diameters. 
Vorticella macrophya, sp. nov.—Body elongate-conical or obconic, twice to two 
and one-half times as long as broad, widest at the anterior margin and thence taper- 
ing to the attenuate posterior extremity; peristome border revolute, not everted; 
cuticular surface finely striate transversely ; ciliary disk slightly and obliquely ele- 
vated; nucleus band-like, short, curved and situated in the anterior body-half; i- 
cel once and one-half to twice as long as the body, the muscular thread stout; con- 
tracted zodid obovate, the posterior extremity sheathing the distal end of the spirally 
coiled pedicel. Length of body ;},inch. Habitat: Attached to Kaen of Lemna 
from shallow ponds near Olean, Western New York. li 
Jutting outward from the edge of Luna edand on the Ameri- 
can side of Niagara falls, within twelve feet of the curving brink 
of “the cataract which here shoots down the precipice like an 
avalanche of foam,” projects a rock submerged and washed by 
the almost rythmic flow of the reflex currents from that mighty 
flood, There tangled clusters of a deep green Alga clung by a 
single point of attachment. The ripples swept above and left 
