298 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



SE5ARMA (SESARMA) BARBIMANUM Cano. 



Sesarma liflrbimana CANO, Boll. Soc. Nat. Napoli, ser. 1, vol. 3, 1889, pp. 93 

 and 245 (type-locality, Payta ; type in Naples Mus.). 



Diagnosis. Palms pilose outside. 



Description (after Cano). Carapace subquadrate, surface rugu- 

 lose and pubescent, a rudimentary tooth behind the lateral tooth. 



Front less deflexed than in S. crassipes. 



Chelae sub rotund, outside densely and coarsely pilose as far as the 

 base of the fingers, the prehensile borders of which are armed with 

 small acute teeth. 



Merus joints of legs with a broad dilatation below, which ends in 

 a rather strong tooth. Next two joints short-hirsute, dactyli in- 

 curved, armed below with spinules. 



Measurements. Female type, length of carapace 6, width of same 

 7, width of front 3.3 mm. 



Range. Payta, Peru. 



Subgenus HOLOMETOPUS Milne Edwards (= SESARMA de Man, not Say). 



Carapace without a lateral tooth behind the outer orbital tooth. 

 Manus without oblique, coarsely pectinated ridges on upper surface. 



SESARMA (HOLOMETOPUS) RECTUM Randall. 



Plate 82. 



Sesarma recta RANDALL, Journ. Acad. Nat. Sci. Philadelphia, vol. 8, 1839, 



(1840), p. 123 (type-locality, Surinam; male holotype in Mus. Phila. 



Acad. Sci.). ORTMANN, Zool. Jahrb., Syst, vol. 10, 1897, p. 331, pi. 17, 



figs. 8 and 80. 

 Sesarma muUcrii A. MILNE EDWARDS, Nouv. Arch. Mus. Hist. Nat. Paris, 



vol. 5, 1869, p. 29 (type-locality, " Destero (Bre'sil) ;" type in Paris 



Mus. ) . 



Diagnosis. Large, coarse. Hands broad, a single line of granules 

 above. Merus joints of legs less than twice as long as wide. 



Description. A large species. Carapace distinctly broader than 

 long, diminishing a little in width from front to back, deeply 

 grooved; surface rough with pits and transverse ridges, which on 

 the anterior part are short and squamose, and which are in large 

 part furnished with tufts of hair. A short oblique ridge, not far 

 behind the antero-lateral angle, meets the lateral margin so as to 

 form a slight swelling which is not a true tooth. 



Supra-frontal lobes deeply separated, the inner pair not much 

 wider than the outer pair. Front about six times as wide as high; 

 sides parallel, lower margin cut into two lobes very prominent in 

 dorsal view. Upper margin of orbit directed strongly backward and 

 outward, outer angle prominent. 



