CYTHERE. 
165 
extremity of the last joint, differing materially in this 
respect from the same organs in the Cypris. The inferior 
antennae (t. XX, f. 5<?) are inserted immediately beneath 
these, and are by far the stronger of the two. They differ 
considerably in shape from the superior ones, being 
flatter, falcated in appearance, and as in the Cypris and 
Candona, more like feet than antennae. They consist of 
five articulations; the first and third being very short. 
The last gives off on internal edge, three spines, and is 
terminated by a tuft of stout setae, as in the Candona, 
while from the base of the second joint there springs a 
long, stiff seta, equalling in length the last two joints, 
and being divided into three articulations, of which the 
middle is the longest. This seta is mentioned by Muller 
as occurring in the Cy there lutea , and is taken notice of 
by him as being peculiar to it, or at best as not having 
been seen in any other species. It occurs, however, in all 
that I have examined, and seems to take the place of the 
pencil of long hairs that is to be found on the penultimate 
joint of the corresponding organs in the genus Cypris, 
but the precise use of which I do not understand. These 
organs are, as in the Cypris and Candona, directed back- 
wards. 
The feet (t. XX, iAd, 5 /) are three pairs in number, and 
are all exactly like each other, except in length. They 
are round and slender, and consist each of five articula- 
tions, the second of which is the largest, and gives off a 
short spine from its base. The last is the shortest, and 
is terminated by one or two long, curved hooks, or strong 
setae. They are all directed forwards. The first of these 
three pairs is very short ; the second a little longer ; 
whilst the third, or last pair, is the longest of all, being 
longer than the inferior antennae, though much more 
slender. This last or posterior pair (f. 5 /) appears to arise 
from near the junction of the two halves of the body, and 
may supply, as Muller says, the want of the tail. 
The mouth is situated in the inferior surface of the an- 
terior half of the body, as in the Cypris, and appears to 
