12 S. J. Smith on Brazilian Crustacea. 



fourth or last tooth with a sleuder spiuiform tip directed forward and 

 upward and with a sharp granuhited ridge extending from its base 

 inward upon the branchial region and nearly parallel to the postero- 

 lateral margin. The areolation is well pronounced and agrees in the 

 main with C. angulatu-t Dana. In the depression on each side just 

 in front of the anterior lobes of the branchial region there is a trans- 

 verse line of three obscure, oval, smooth spots. From the small tooth 

 in the postero-lateral margin, a short ridge extends backward just 

 above and pai'allel to the margin as far as the lateral angle of the 

 carapax. 



The ehelipeds are stout and equal. The merus is triangular and the 

 angles granulous. The carpus, and the hand nearly to the tips of the 

 fingers, are sharply granulous. The fingers are slender and their 

 inner edges nearly straight and armed with regular rounded tubercu- 

 liforra teeth. 



In the ambulatory legs the meral segments are granulous above 

 and on the angles. The dactyli of the first three pairs ai'e naked ex- 

 cept a few hairs on the posterior edge at the base, slender, somewhat 

 curved, smooth and deeply sulcate; those of the posterior pair are 

 shorter, compressed, and their edges thickly clothed with soft hairs. 

 In the first pair of legs the posterior edge of the propodus is clothed 

 nearly its whole length with a brush of soft hair ; in the second pair 

 there is a similar brush but only on the terminal half; in the third 

 pair it is wholly wanting, or represented only by a few hairs near the 

 articulation with the dactylus. In the jDosterior pair of legs the edges 

 of the dactylus, propodus and carpus are densely clothed with soft 

 hair. 



The male sternum is concave in a lateral direction, and the articula- 

 tions between the segments of the abdomen are nearly straight instead 

 of cur\^ed as in C. angulatus. 



Length of carapax in a male, 31'0'"™ ; breadth of carapax, o5"6'"'" ; 

 ratio of length to breath, 1 : 1'15. Breadth between outer orbital 

 teeth, 24-8"""; ratio of this breath to breath of carapax between 

 lateral teeth, 1 : 1 -43. 



This species was not obtained by Prof Ilartt. The only specimens 

 which I have seen are two males, in the collection of the Peabody 

 Academy of Science, Salem, Mass., brought from Rio de Janeiro by 

 Capt. Harrington. 



The C. clrripes differs from C. angulatus Dana (United States Ex- 

 ploring Expedition, Crust., p. 352, pi. 22, fig. 6), from Rio Negro, 

 Northern Patagonia, and heretofore the only known species of the 



