310 BULLETIN 152, UNITED STATE8 NATIONAL MUSEUM 



Puerto Corral; February, 1903; C. E. Porter; 1 male, returned to 

 sender. 



Juan Fernandez Islands; 1926; W. L. Schmitt: Along boulder 

 covered beach to left of "factory"; December 8; 4 males, 2 females, 

 1 young (60752). Cumberland Bay; December 11; 1 young (60751). 

 Dredged in Carbajal Bay; 15 to 20 fathoms; December 15; 1 young 

 female (60753); color brownish. From tufts of seaweed in mouth of 

 Plagusia collected on weed-covered rocks along shore; December 22; 

 1 male, 1 female (60754). 



LEPTODIUS COOKSONI Miers 



Plate 142 

 Leptodius cooksoni Miers, Proc. Zool. Soc. London, 1877, p. 73, pi. 12, figs. 1-ld 



(type-locality, Charles Island; type in British Museum). 

 Leptodius lobatus A. Milne Edwards, Crust. R4g. Mex., 1880, p. 271, pi. 49, 



figs. 4-46 (type-locality, Chile; type in Paris Mus.). 

 Xanihodius lohatus Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 589; vol. 38, 



1910, p. 582. 



Diagnosis. — Antero-lateral margins lobed. Wrist and hand deeply 

 dimpled; hand longitudinally ridged outside and above, especially 

 on upper inner margin. Color of immovable fingers not extending on 

 palm. 



Description. — Carapace everywhere punctulate, punctulations more 

 crowded on anterior part; areolets and intervening fissures well 

 defined. Frontal margin sinuous, median lobes distinctly more 

 advanced than lateral. Antero-lateral margins thick and rounded, 

 tooth at external orbital angle obsolete, the next three projections are 

 rounded lobes, the last lobe small with a short tip pointing a little 

 forward and upward. Posterior to the last lobe are two or three short 

 transverse lines; 1 L is merged with its marginal lobe, 3 L and 4 L 

 are separated from their marginal lobes by a shallow furrow, 3 L is 

 posteriorly united with 2 L; 1 M is fused with 2 M, the latter longi- 

 tudinally divided for two-thirds its length, outer lobule wider than 

 inner. 



Chelipeds strong, granulate ; exposed surface of wrist and hand with 

 numerous raised reticulating lines and also longitudinal granulated 

 lines on outer surface and a pronounced ridge on upper inner margin 

 of hand; a blunt tooth at inner angle of wrist. Legs short, smooth, 

 almost without hairs, except on the dactyli and lower edge of propodi. 



Color. — Deep reddish brown with yellow spots, more numerous 

 toward posterior part of carapace (A. Milne Edwards). 



Measurements.- — Male (22008), length of carapace 15.6, width of 

 same 25, fronto-orbital width 11.2, front 6.5 mm. 



Range. — Clarion Island, Mexico; Galapagos Islands; Chile (A. 

 Milne Edwards). 



Material examined. — Socorro Island, Mexico; Hanna and Jordan, 

 California Acad. Sci.; 2 males, returned; 1 female (62701). 



