THE AMERICAN 
MONTHLY 
MICROSCOPICAL JOURNAL. 
Wor. V LIT. AUGUST, 1887. No. 8 
Notices of new fresh-water infusoria.— VI. 
By Dr. ALFRED C. STOKES, 
TRENTON, N. J. 
Anthophysa stagnatilis, sp. nov. (Figs. 1 and 2). 
Bodies subpyriform, slightly compressed, about three times as long as broad, 
one lateral border convex, the opposite concave, the animalcule thus appar- 
ently curved toward one side; the anterior border truncate or slightly exca- 
vate, the posterior body-half tapering to the point of attachment ; nucleus 
posteriorly located near the convex border; contractile vesicle apparently 
single, placed near the centre of the same region; endoplasm granular. 
Colonies social, elongate, subcylindrical, from two to four times as long as 
broad, composed of fifty or more zooids ; pedicle brown, soft, very Weense 
finely and somewhat irregularly striate, rarely branched, but forming exten- 
Sve: inextricably-tangled, decumbent aggregations. Length of the bodies 
ze'gz inch ; height of a fully developed colony about ;4, inch. Hab.— 
Stagnant water, with decaying vegetation. 
This interesting colonial organism differs from A. soc¢alés (From.) S. K. 
in the form of the zooids, the “number of individuals in the clusters, there be- 
ing but eight in A. soczadzs, and in the lax, flexuose, and tangled condition 
of the pedicles. From A. vegetans it is separated by the absence of the 
rosette-like colonies characteristic of the former, the absence of the distinctly 
branching pedicle, and by the position of both the nucleus and the contrac- 
tile vesicle. The last-named organs have assumed a position in A. stagna- 
tel¢s exactly the reverse of that which obtains in A. vegetans, the nucleus of 
the latter being subcentrally placed, with two or more posteriorly located 
contractile vesicles, while, in addition, the pulsating vacuole of the present 
species is apparently single. 
The colonies, as with Sane forms, often leave their pedicles and swim freely 
by a rotatory motion. In this free swimming state the subcylindrical form 
frequently almost entirely disappears, the clusters becoming subspherical. 
This, however, is not always the case, as in some instances they become even 
more elongated than when attached to the foot-stalk. 
Hlexamita gyrans, sp. nov. (Fig. 3). 
Body soft and changeable in shape, broadly ovate or subspherical, somewhat 
depressed, less than twice as long as broad; flagella exceeding the body in 
length, the two trailing appendages originating from the posterior extremity 
at some distance apart, the four anterior vibratile arising at some dis- 
tance from the frontal border, and arranged in two groups of two flagella 
each, the two of each group arising opposite one another with the thickness 
of the body between them, the free ends pie curved ; contractile vesicle 
small, anteriorly situated. Length of body 3,4, inch. Hab.— Standing 
