58 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



larly to the tips. A line of granules on lower margin of propodus. 

 Margins of clielipeds fringed with hair. 



Legs shorter and broader than in C. typicus, hairy. 



Sternum and abdomen of female smooth, punctate. 



Color. In alcohol the carapace is a bluish-gray, chelipeds pale 

 pink, ventral side of crab and ambulatory legs rust-colored. 



Measurements. Female holotype, length of carapace 12.5, width 

 of same 17.8 mm. 



Material examined. Known only from the type-specimen from 

 Magdalena Bay, Lower California; lat. 24 38' 00" N.; long. 112 

 17' 30" W.; 51 fathoms; gn. M.; May 2, 1888; station 2833, Str. 

 Albatross; 1 female (21592). 



CHASMOCAKCINUS OBLIQUUS Rathbnn. 

 Plate 14, figs. 1 and 2. 



Chasm ocarcinus obliquus RATHBUN, Bull. Lab. Nat. Hist. State Univ. 

 Iowa, vol. 4, 1S9S, p. 2SG, pi. 7, fig. G (type-locality, southeast of Amlros 

 Island, Bahamas, 97 fathoms, station 2651, Albatross; holotype mule, 

 Cat. No. 20309, U.S.N.M.). 



Diagnosis. Orbits directed obliquely backward and outward. 

 Carapace very narrow; no antero-lateral marginal line. Sternum 

 and abdomen smooth. 



Description. Carapace narrow, nearly as long as broad, without 

 distinct lateral margin. Surface smooth, finely and obscurely punc- 

 tate. Median notch of front shallow. Superior margin of orbit 



Pio. 27. CHASMOCARCINUS OBLIQUUS, MALE noLOTYpE. a, RIGHT CHELA, OUTER VIEW, 



X 8 J b, ABDOMEN AND 1'ABT OF STERNUM, X 14. 



directed obliquely backward and outward, outer end rounded, eye 

 filling the orbit. 



Chelipeds nearly equal in the immature male. Lower margin of 

 merus armed with spines; a long slender spine on carpus; fingers 



