34 NEW-YORK FAUNA — CRUSTACEA. 
GENUS GONODACTYLUS. Latrezlle. 
General shape of the preceding genus, but the enlarged jaw-feet not toothed along their edges. 
GoNODACTYLUS SETIMANUS. 
PLATE VIII. FIG. 23. 
(CABINET OF THE LYCEUM.) 
Description. Shield oblong, with its side much elongated ; a transverse lunate suture on its 
lower portion in front, with two spinous projecting teeth covering the ophthalmic ring. Inter- 
nal antenne long, smooth, and furnished with plumose sete ; external shorter, bifid at their 
extremities, which are articulated. The penultimate segment of the jaw-foot is flattened, 
carinate on its upper margin, dilated and furnished with long plumose sete ; beyond this are 
three segments gradually diminishing in size to the last, which is oblong-oval, plumose on 
both margins. First two pair of feet didactyle; the two following with the terminal joints 
flat and rounded, the edges ciliated. The penultimate abdominal segment slightly arcuated, 
without spines, and with three rounded unarmed fins on each side, of which the inferior is 
largest. 
Color, greyish; tips of the claws of the anterior pair, ciliz on the extremities of the others, 
and the fins, black. 
Total length, 3°2; of the anterior pair of feet, 1°5. 
This species was obtained from the stomach of a Cod-fish in the market. I have to regret 
that it was too much mutilated to enable me to present its characters more in detail. It is 
only provisionally placed here, for in many particulars it is much more nearly allied to the 
family Erichthide. 
