C A R I D E A. 



567 



very short. Outer uiaxillipeds have some short spinules at apex, and 

 on upper margin towards apex, but are not prominently hirsute or 

 pubescent. Hand of first pair not shorter than carpus, linear, two or 

 three times as thick as following pairs of legs. Six posterior legs 

 nearly naked, penult joint quite long; tarsus spinulous within. 

 Fourth and fifth joints of abdomen acute either side. 



HlPPOLYTE LAMELLICORNIS. 



Rostrum longum verticaliter latissinium, fere ad thoracis basin produe- 

 tum, apice bifidum, supra sinuosum, super cephalothoracem i-sp)i- 

 rwsum, anterius ft-spini-dentatum, spinulis incequis, totis inter se sub- 

 ceque remotis; infra tria/ngulatum, 2-dentatum. Antennae internee 

 rostro pairce longiores. Pedes antici gracillimi, 2dis paulo cretssiores. 

 Pedes 2di Stiis vix breviores, carpo elongate, 1-articulato, articido 

 carpi Btio longo. Tarsi pedum sequentium fere inermes, spinulis 

 versus basin subtil issimis. Meixillipedes externi apice spinulosi, arti- 

 cido ultimo supra pubescente. 



Beak long, broad lamellate, produced nearly to posterior margin of 

 thorax, bifid at apex, undulate above, four spines upon cephalo- 

 thorax, and about six upon proper beak, teeth or spines unequal, 

 all nearly equally spaced ; outline of beak below triangulately 

 salient, two-dentate. Inner antennas little longer than the beak. 

 Anterior feet very slender, but little stouter than the next pair. 

 Second pair hardly shorter than third, carpus elongate, seven- 

 jointed, third joint quite long. Tarsi of following pairs nearly 

 unarmed, a few very minute spinules towards base. Outer maxil- 

 lipeds spinulous at apex, last joint pubescent above. 



Plate 36, fig. 6 a, animal, natural size ; b, extremity of outer maxil- 

 lipeds, enlarged six diameters ; c, carpus and hand of second pair, 

 ibid. ; d, part of third pair, ibid. 



Dungeness, in the Straits of De Fuca, Northwest America. 



Length of body, one and a half to two inches. The four dorsal 

 spines are rather larger than those of the beak proper; and the first 



