THE GRAPSOID CRABS OP AMERICA. 



407 



Front narrower than usual in this group, less than one-fifth width 

 of carapace, its sides longer than the slightly convex lower margin. 

 Orbital margin moderately oblique and sinuous. 



Merus of large cheliped of male crossed with short granulate rugae; 

 carpus scabi-ous. Upper part of outer surface of hand coarsely granu- 

 late or tubercu- 

 late, very finely 

 granulate below, 

 as on the fingers 

 also. Fingers 

 twice as long as 

 palm, narrowly 

 gaping; prehen- 

 sile edges with 

 one or more 

 larger tubercles; 

 one of these is a't 

 the basal fourth 

 of the dactylus. 

 Inner face of 

 palm with a sin- 

 gle row of tu- 

 bercles on the 

 oblique ridge, 

 which turns at a 



riL'ht angle at the middle, after which it is continued but a short 

 distance. Surface between ridges smooth. 



Merus of ambulatory legs much dilated. 



Measurements. — Male (22192), length of carapace 17.2, w^idth of 

 same 27.5 mm. 



Range. — Jamaica and Porto Eico to Brazil. 



Material examined. — 



Jamaica; Mar. 1-11, 1884; Albatross; 1 male (22321). 



Rio Bayamon, above Palo Seco, Porto Eico; Jan. 16, 1899; Fish 

 Hawk; 2 males, 1 female (24541). 



Fajardo, Porto Rico; Feb. 17, 1899; Fish Uawh; 1 male, 1 female 

 (24542). 



Victoria, Brazil; Thayer Exped.; 2 females (22193); 5 males, 19 

 females (M.C.Z.). 



Natal, Rio Grande do Norte, Brazil; June 29, 1899; Branner- 

 Agassiz Exped.; 1 male (25099). 



Cabedello, Rio Parahyba do Norte, Brazil; June 20, 1899; Branner- 

 Agassiz Exped.; 7 males, 1 female (types) (23753). 



Rio Parahyba do Norte, Brazil; Thayer Exped.; 1 male (22192), 

 4 males, 1 female (M.C.Z.). 



FlO. 1G9. UCA TnAYEUIj MALE (23753), NATURAL Sl/E. 



SAL VIEW ; h, IXXEU SUUKACE OB" LAUGElt CHELA. 



a, Doa- 



