THE GRAPSOID CEABS OF AMERICA. 267 



Posterior border of epistome sinuous in front view; with two re- 

 <?ntering lobes in ventral view. Merus of maxilliped obcordate. 



Stridulating ridge thick, its outer half divided in the male into 

 three or four dentiform tubercles, inner portion finely crenulate; in 

 the female the ridge is broken into about 15 tubercles which are 

 longer in the outer half. It scrapes against a short curved horny 

 ridge at the distal end of the inner margin of the arm. 



Chelipeds granulate. Upper border of arm, inner border of wrist 

 and inner surface (in the male) of chela, clothed with thick hair. 

 Legs margined with fringes of hair. Inner margin of wrist bluntly 

 angled. Palm inflated, very convex below, upper surface rounded, a 

 faint longitudinal ridge runs obliquely on to the pollex. Fingers 

 narrowl}^ g'^^ping? teeth irregular, tips horny. 



Legs of medium width; dactylus of last pair proportionally 

 broader than the others. 



Sixth segment of male abdomen longer than fifth, but equalling 

 the seventh. 



Measurements. — Male (25032), length of carapace 27.5, width of 

 same 32 mm. 



Range. — Chile ; west coast of Patagonia ; also New Zealand. 



Material examined. — 



Lota, Chile; Albatross; 1 y. (22103). 



Cavancha, Chile ; Plate, coll. ; received from Lubeck Mus. ; 1 female 

 (33157). 



Chiloe Island, Chile (M. C. Z.). 



Port Otway, Patagonia; Feb. 9, 1888; Albatross; 47 males, 9 fe- 

 males (22102). 



New Zealand; Otago Univ. Mus.; 1 male, 1 female (16230). 



Bay of Islands, New Zealand; U. S. Exploring Exped. ; 2 males 

 (2330). 



Port Chalmers, New Zealand ; Charles Chilton ; 2 males, 3 females 

 (18165). 



Dunedin, New Zealand; George M. Thomson; 1 male, 1 female 

 (25032). 



Locality unknown; U. S. Exploring Exped.; 2 males, 2 females 

 (2432). 



HEMIGEAPSUS NUDUS (Dana). 



Plate 69. 



Cyclograpsus marmoratus White (not Cancer marmoratiis Fabriclns), 

 List Crust. Brit. Mus., 1847, p. 41, nomen nudum (type-locality, Sitka; 

 type in Brit, Mus.). 



Pseudograpsus nudus Dana, Proc. Acad. Nat. Sci. Philadelphia, ISIl, p. 

 249 (type-locality, in Orcgoniae frcto " Puset " ; type. Cat. No. 2331, 

 U. S. Nat. Mus.) ; U. S. Expl. Exped., vol. 13, Crust., pt. 1, 1852, p. 335; 

 1855, atlas, pi. 20, fig. 7o-e. 



