S92 CRUSTACEA [Octciber 



insertion of the feet, and a little dilated at base, each 

 more than thrice the length of the head, and together 

 forming a moiety of the total length, third, fourth and 

 fifth segments equalj each about half as long as the pre- 

 ceding one, sixth and seventh segments much smalkr^ 

 subequal; feet, anteriores small, hand toothless, triangu- 

 lar-ovate, and with the carpus forming an oval mass, nail 

 closing without interval, second pair very large, conspi- 

 cuous, placed near the middle of the body, hand oblong- 

 oval, palm rectilinear, bidentate, teeth nearly perpendicu- 

 lar, placed one before the middle of the palm, the other 

 nearer the base, a third smaller tooth sometimes inter- 

 venes, thumb much curved, closing with a wide interval, 

 the tip attaining the tip of the posterior tooth, and con- 

 cealing with its base the anterior one. 



Lengih about one inch. 



A large species, remarkable for the size of the second 

 pair of feet and their being placed nearly equidistant from 

 the extremities of the body; I found them common in 

 the bay of Charleston, particularly at Sullivan's island^ 

 on the two species of Gorgonia so common in the salt 

 water creeks of our southern coast. 



Genus CYAMUS. Lafr, 



Body suboval, segments transverse, anterior one con- 

 founded with the head, feet ten, robust, armed with a 

 strong nail, third and fourth pairs spurious; antenna four, 

 superiores longer, of f'^ur articulations, of which the last 

 is entire, eyes two; stemmata two. 



