Notes on North American Crustacea. 239 



prominent grannies. There is also a deep snlcns of the same character 

 bnt very narrow, separating the cardiac from the branchial regions and 

 passing behind the former region, separating it from the th.ck mtestmal 

 lobes. A slight shallow depression on the branchial region, along the 

 postero-lateral margin. On the protnberant middle and posterior paiis 

 of the carapax the granules are very large, and somewhat irregnlarly 

 piled npon each other, leaving upon the cardiac numerous small eroded 

 cavities: There is also a little pit oU each of the median pro- 

 tuberances. The front is strongly prominent, with a concave margm 

 fissured at the middle. The orbits are small, opening above so tha the 

 eyes may be seen. External maxiUipeds granulated, most strongly so 

 near the extremities, where the acute tips of the endognaths project con- 

 siderably beyond the obtuse extremities of the exognaths. Chehpeds of 

 moderate size, somewhat depressed ; meros broader than the hand, with its 

 outer margin convex and a little irregular, but not prominently tubercu- 

 lated as in L. curm^gn ; hands rather small, uniformly granulated 

 above and below, and tapering to rather slender fingers. Ambulatory 

 feet cylindrical, covered with small granules, which upon the dactyli 

 become very minute, crowded, and almost spinuliform. Sternum and 

 abdomen covered with small, hard, smooth tubercles, and ornamented 

 with seven or eight red dots. Abdomen armed with a backward- 

 pointing tooth at the extremity of the penult joint. Length of carapax 

 in a male, 0.42; breadth, 0.430 inch. 



The genus was founded by Bell for a Central American 

 species, Z. cummgii, the only one hitherto known, from which 

 ours differs in its less prominent marginal teeth of the carapax. 



L cariosa was dredged on a bottom of somewhat mdurated 

 ferruginous sand, in two fathoms, in one of the channels of the 

 harbor of Beaufort, N.C. 



DEOMIOIDEA. 

 Bynomeiie iirsula, nov. sp. 



The whole upper surface is covered with stout thick setae of two 

 kinds ;-the first kind very short, clavate, or even pedicellate, and 



