Dr. F. Miiller on Philomedusa Vogtii. 433 
an opake pale-yellow ring; less constantly there are similar 
spots on the outside at the base, and brownish spots between 
these. 
The entire surface of the body bears a short-ciliary coat ; and 
elongated-narrow thread-capsules, of 0°012 to 0-016 millim. in 
length, occur everywhere, but are especially numerous on the 
tentacles. 
The form of the mouth is very variable. When the tentacles 
are bent obliquely backwards, it usually appears as a wide open 
funnel, surrounded by eleven pads separated by sharp furrows, 
preceding the same number of tentacles. One of the shorter 
tentacles thus remains without a representative pad; whilst the 
two neighbouring corresponding pads are distinguished by their 
breadth, as indeed the longer tentacles in general are represented 
by broader and the shorter ones by narrower pads. The mouth 
rarely appears nearly round, but is usually elongated in the 
direction of the diameter passing through the tentacle which is 
destitute of a basal pad. Corresponding to this tentacle, there 
remains between the two adjacent pads a tolerably deep channel, 
at the outer extremity of which each of these pads is drawn out 
into a small tongue-like process. A third similar process lies be- 
tween these two, opposite to the padless tentacle. These three 
processes, which are usually white and opake, strike the eye 
particularly when, the tentacles being directed obliquely for- 
wards, the mouth is nearly closed: the pads, which are nothing 
but peculiar inflations of the cavity of the body, are then a good 
deal flattened, and the tongue-like processes, being extended 
straight out, rise above their level. 
The buccal pads, the furrows separating them, and the chan- 
nel commencing at the tongue-like*processes are continued into 
the short stomach, which attains about twice the length of the 
tentacles, and is the immediate continuation of the funnel of the 
mouth. The margins of the channel appear to be capable of 
laying themselves together to form a complete tube in the whole 
length of the stomach. At the bottom the stomach is in com- 
munication, by a wide orifice, with the body-cavity, into which 
one may not unfrequently look down from the mouth. When it 
closes by bringing its walls together, it appears flat—narrow 
when seen in the direction of the diameter passing through the 
channel, broad when seen in a direction perpendicular to this. 
Tn the latter lateral view it is seen to project into the cavity of the 
body further on the side of the channel than on the opposite side. 
The wide body-cavity is clothed throughout with cilia. Around 
the stomach it is divided by muscular walls into twelve cham- 
bers, which correspond with the tentacles, and are continued 
into their cavities. The partitions do not reach quite to the 
