APODIDiE. 
23 
ciliated edges, and another of an oval shape, which 
Schoeffer says is of a red colour when the animal is alive, 
and is swollen into the form of a small sac or vesicle. 
This first pair of feet are the principal organs of motion 
which the animal possesses, and have by many authors 
been mistaken for and described as the antennae ; and cer- 
tainly their length and the numerous small articulations 
of which they consist cause them to resemble very closely 
the antennae of the Decapods. They are more properly 
called the rami. The other pairs of feet are branchial, 
and do not serve the purpose of locomotion. They are 
much broader, shorter, and of a lamellar structure, and 
gradually become smaller and smaller as they descend in 
the series, till at last they are merely rudimentary. As 
they serve for respiration, and not for locomotion, their 
structure is considerably different from that of the pair 
above described ; but though altered to suit their change 
of function, we may still trace the same structure per- 
vading the whole of them. The chief portion, as seen in 
the first pair of these branchial feet (t. I, f. e) is of 
much the same form and structure as the basilar portion 
of the preceding pair, and like it is divided into three 
joints. The anterior joint gives off two large lanceolate- 
shaped fingers or claws, strongly dentated on their edges 
(corresponding with the two long many-articulated ap- 
pendages of rami), and a small one of similar structure, 
which Schoeffer denominates a false claw (corresponding to 
the flat claw-like production of first pair). The middle 
joint gives off a similar body, also dentated on its edges ; 
and the posterior joint gives off a short, erect body, of a 
somewhat similar structure (corresponding to the two 
shorter, many-jointed appendages), while it is terminated 
by the same ciliated-edged bodies as Schoeffer calls, in the 
first pair, false teeth . The triangular branchial plate, 
with its strongly-ciliated edges, and the vesicular plate or 
little sac of Schoeffer, are also here attached to the first or 
anterior joint of the basilar portion. The eight succeeding 
pairs are very much the same as those described above, 
