in the Museiiin of the Smithsonian Institution. 107 

 Micropaiiope latiiiiaiia, nov. sp. 



Carapax moderately convex, naked, smooth, and polished, except 

 toward the anterior and antero -lateral margins, where it is somewhat 

 granulated. Front rather broad, and little projecting; lobes with 

 straight mai-gins. Subhepatic region minutely granulated. Cheli- 

 peds large and angular ; hands broad, smooth, and polished, strongly 

 protubei-ant at the postero-inferior angle ; palm broadei- than long ; 

 fingers neai'ly as long as the palm, deflexed, and black ; the black of 

 the propodal finger extends on the palm for one-third its length. The 

 hands are unequal, and the fingers of the smaller one are longer and 

 more deflexed than those of the greater one, which gives the smaller 

 hand a more angular form and a deeply concave inferior outline. 

 Ambulatory feet slender, smooth, and sparsely hairy. 



Dimensions of a male : Length of carapax, 0.28 ; breadth, 0.38 inch. 



Found at Cape St. Lucas by John Xantns, Esq. 



Micropaiioiie cristiawaiia, nov. sp. 



Carapax convex, smooth posteriorly, and with a transverse i"idge, 

 interrupted at the middle, on the gastric, and one on each hepatic 

 and branchial region. Front convex, rather strongly projecting at 

 the middle, where there is a deep sinus, from which arises a deep 

 furrow extending backward to the gastric region. Posterior lateral 

 tooth rather more prominent than in 31. latimana. Hiatus of outer 

 side of orbit almost entirely obsolete. Inferior inner tooth of orbit 

 large. Basal joint of the external antennas very short. Chelipeds 

 large, smooth, and polished ; carpus with one tooth at the inner angle, 

 and a short crest, bordering a depressed area, at the outer angle ; 

 hands very short and broad, and compressed, especially above, where 

 a smootli crest is formed ; posterior outer extremity of hand protvi- 

 berant and bituberculate, the tubercles being most conspicuous in 

 the greater hand. Fingers black, with white tips ; those of the smaller 

 hand much deflexed and longer than the palm. Ambulatory feet 

 rather compressed and faintly crested above ; dactyli pubescent. 



Dimensions of the carapax in a male : Length, 0.22 ; breadth, 0.27 

 inch. 



Cape St. Lncas. J. Xantus. 



