Giascorr—A List of some of the Rotifera of Ireland. 4] 
though quite a giant as compared to its hitherto sole representative 
M. clavus. We have the same contour of the body, the same long 
foot continuous with the trunk and terminating in a single acutely 
pointed toe, the same upright position, hovering motion, and per- 
manently expanded disc of that species. The latter, however, was: 
not produced into a flattened rim, but remained always of the same 
circumference as the body, the margin being interrupted by many 
depressions and elevations. The interior of the cup also contained 
some cushion-like prominences, somewhat similar to those of Hy- 
datina senta. I regret that I can only give a proximate idea of 
these outlines as the creature disappeared from view before my 
observations were completed. There were two prominent projec- 
tions on the margin of the disc toward the centre of the ventral 
aspect which were most probably the ventral antenne. Depressed 
at the sides the margin then swept upward in waving curves to a 
dorsal elevation, at the back of which was seated the tuberculate 
dorsal antenna. ‘There appeared to be a wide-spread brain, which 
dipped downward in the middle; and from the centre of the cup 
there gleamed a large red eye. I could not discern the trophi. An 
ample stomach was surmounted by two clear globe-shaped gastric 
glands, which were very conspicuous. The body was smooth, cylin- 
dric, but somewhat flattened ventrally, and of a dull amber colour. 
It hovered about in an upright position, and made little jerks for- 
ward, as though snatching at tiny atoms of food. Length, about 
=izth of an inch. 
Habitat.—A. ditch, Co. Wexford. — 
Sacculus viridis, Gosse. 
[The Rotifera, vol. i. p. 124, Pl. XI. fig. 2.] 
Not unfrequent. Trophi often protruded with a snap. 
Habitat.—Ponds and deep drains, Co. Wexford. 
Synchata pectinata, Hhrenberg. 
{The Rotifera, vol. i. p. 125, Pl. XIII. fig. 3.1 
Not common. 
Habitat.—Ponds, Co. Wexford. 
