ORDER BRANCHIOPODA. 
335 
setaceous, composed of seven or eight articulations, the last 
of which are shortest, and terminated by a fasciculus of ten 
or fifteen setse, serving as fins. The mouth is composed of a 
carinated labrum, of two large denticulated mandibles, each 
supporting a palpus divided into three articulations, and to 
the first of which adheres a small branchial plate, presenting 
five digitations (interior labium, Ramd.), and of two pairs 
of jaws; the upper two, much larger, have at the internal 
edge, four mobile and setaceous appendages, and at the ex- 
ternal side a large branchial plate, pectinated at its anterior 
edge ; the second are composed of two articulations, with 
a short palpus (forked in cypris strigata , Ramd.), almost coni- 
cal, inarticulated, silky at the end, as well as the extremity 
of their jaws. A sort of compressed sternum performs the 
office of lower labium (external labium, Ramd.) The feet 
are divided into five articulations, the third of which repre- 
sents the thigh, and the last the tarsus ; the anterior two are 
inserted below the antennae, much stronger than the others, 
directed forwards, with stiff setae, or long hooks, gathered 
into a fasciculus, at the extremity of the last two articula- 
tions ; the following four feet are without them. The second, 
situated at the middle of the under part of the body, are at 
first inclined backwards, arched, and terminated bv a long and 
strong hook, which goes forward ; the last two never appear 
externally, are raised, and applied on the posterior sides of 
the body, to support the ovaries, and are terminated by two 
very small hooks. In the figure of Ramdohr, these feet have 
but three articulations, and the last is a little dilated and 
emarginated at the end, with a hook in the middle of this 
emargination. The body presents no distinct articulation, 
and is terminated posteriorly in a kind of tail, soft, folded 
underneath, with two conical or setaceous filaments, furnished 
with three seta) or hooks at the end, directed backwards, and 
issuing from the testa. The ovaries form two large simple 
