160 PROCEEDINGS OF SOCIETIES. 
scribed by Mr. Davis, he (Mr. Hogg) rather looked upon this as 
the expulsion or rejection of digested food. The transparent cha- 
racter of the case led him to the conclusion that it was of the 
same nature as that enclosing other groups of Rotifers. In most 
of them some two or three eggs could be seen, and therefore it 
might rather be looked upon as a receptacle for the ova. Upon 
gently pressing out one of the eggs, which are ciliated, it swam off, 
and after a little time attached itself to the side of the glass cell. 
The young animal was presently hatched, and soon became en- 
closed in a similarly transparent sac. The ciliary trochal disc 
moved with beautiful regularity, and the two long antenne ex- 
tended at right angles to it had a remarkable appearance, and 
were certainly long enough to be employed in a building process, 
but could not be discovered by him in the act. 
The speaker then described to the meeting, by the aid of draw- 
ings, changes which he had observed, and modifications of the 
shape of the animal, in part resulting from the introduction of 
carmine, &c., into the water. In conclusion, he thought it quite 
right to place this Rotifer among the cistes. 
Mr. Lozs was of opinion that the animal differed very* much 
from the (cistes, and, aided by the drawings used by the pre- 
vious speakers, he described, by making alterations in them as he 
proceeded, the result of observations of several specimens with 
which Mr. Davis had fayoured him. He thought it a very inte- 
resting subject for continued examination, and that eventually 
the animal would not be classed with the cistes. 
Mr. Stack thought this rotifer was one of the most remarkable 
and interesting he had ever seen; he agreed generally with Mr. 
Davis in arranging it provisionally under the head of Weistes, but 
he was at the same time of opinion that when the group to which 
it belonged had been better examined some new arrangement 
would have to be made. If a number of specimens of these ani- 
mals were placed in the hands of different observers, and the 
animals were—as they usually were—influenced by very varying 
humours, there would be seen in the result of such a series of 
simultaneous observations a most beautiful diversity and discord- 
ance of opinion. As evidence of this, he produced a sketch which 
he placed beside Mr. Davis’s drawing, because it exhibited the 
creature under so different an aspect that, although both portraits 
were correct, they might be supposed to represent different ani- 
mals. The new rotifers he found to be very highly ciliated, and, 
in addition to the cilia ordinarily engaged in forming the wreath, 
and giving rise to the rotatory appearance, there were other rows 
of cilia, some of which he had seen engaged in sweeping against 
or “ licking” vegetable matter in their vicinity. With Smith and 
Beck’s th, and careful illumination with Ross’s =4,th condenser, 
the wreath cilia appeared to be as thick as the hairs in a broom. 
Mr. Slack concluded by recommending a re-examination of allied 
species, as he thought their ciliary apparatus would probably be 
