58 Notes on Nortli American Crustacea. 



Ainphitrite clepressirroiiis, nov. sp. 



Carapax convex posteriorly and about the middle, but depressed 

 toward the frontal and antero-lateral margins. Proportion of length to 

 breadth, 1 : 1'49. Surface in part minutely scabrous and pubescent. 

 Antero-lateral margin ciliated and 9-toothed, including the angle of the 

 orbit; teeth nearly equal, the posterior one no larger than that in front 

 of it. Median lobe of front 4-toothed, teeth about equal. Superior 

 margin of orbit with two conspicuous fissures. The joints of the cheli- 

 peds are sharply triangular or prismatic, pubescent; meros 5-spined 

 and ciliated in front, and armed with a single small tooth at the outer 

 apex ; carpus slender, with one long, very slender and sharp spine at 

 the summit, and sometimes a smaller spine on the outer side ; hand 

 with a prominent superior crest, and armed with two small spines, one 

 near the base, and one near the finger ; surface of the hand minutely 

 scabrous; dactylus ciliated above. Ambulatory feet slender; those of 

 the first pair ciliated below ; those of the second and third pairs smooth ; 

 last pair considerably shorter than the third. Abdomen of the male 

 subtriangular, with the lateral margins somewhat sinuous. The color 

 in our specimens is entirely obliterated. The species is described from 

 male individuals, probably young, the dimensions of the carapax in the 

 largest being, — length, 0*79 ; breadth, 1*18 inch. 



It was found on the coast of South Carolina, by Capt. Kurtz, 

 and there are specimens from the Florida Keys in the Smithso- 

 nian Museum. 



OCYPODOIDEA. 



!§l>eocarciimis, nov. gen. 



Carapax longitudinalitcr utrinque declivis, transversim fere planus, 

 retrorsum vix angustatus. Eegio faciei dimidiam carapacis latitudinis 

 paulo superans. Margo antero-lateralis brevis, dentatus. Oculi sat 

 breves, cornels parvis. Orbitic antennseque eis Panopei fere similes- 

 Palatum colliculis carens. Maxillipedes externi valde hiantes, endogna- 



