244 CRUSTACEA OF THE UNITED STATES. [May. 



spine and placed at the outer base of the peduncle; pedi- 

 palpi deeply ciliated, attaining the tip of the peduncles 

 of the antennas, first joint bicanaliculate beneath, third 

 joint spinose beneath, spine movable, tip acute, a little 

 hairy; inferior antenna nearly as long as the ho{S^\ ante- 

 rior feet^ hands very unequal, the larger one appearing 

 deformed, nearly as large as the thorax, compressed, ex- 

 cluding the fingers, semioval, abruptly constricted near 

 the fingers on each edge; fingers very robust, thumb cul- 

 trate, near the base, within a prominent lobe, or tooth, 

 which is received into a corresponding fossula of the base 

 of the finger, surface a little hairy, hairs assembled at tip 

 into a double row, finger concave within for the reception 

 of the thumb, obliquely emarginate above on the inner 

 edge near the tip, and extending into an angle near the 

 middle of the inner edge; carpus minute, transverse, ca- 

 rinated, shorter than the thumb; second pair of feet small- 

 est, but not shorter than the hind ones; three posterior 

 pairs, penultimate joint armed beneath with moveable 

 spines and a few hairs, nails horny, glabrous, acutei tail 

 at tip rounded, narrower than at base, deeply ciUated, 

 above behind the middle four, small, conic, moveable 

 spines, placed in cavities; external lateral lamella bipar- 

 ted, two small spines at the outer tip of the first segment, 

 and two larger at the tip of the peduncle, tips deeply ci- 

 liated; colour, when recent, green, sprinkled with nume- 

 rous, small, brownish spots, a large dark green spot at tip 

 of the caudal lamellae; hand beneath white, fingers tipped 

 with white. 



Length nearly one inch and a half. 



The larger hand bf this animal attracts attention by 

 its unusual size and deformed appearance; the individual 



