124 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Diagnosis. — Appendages of first segment of male abdomen very- 

 short, reaching about to penult segment. Lateral spine short, not 

 more than 2.5 times length of preceding tooth. Carapace coarsely 

 granulate, lateral teeth long. 



Description. — Regions well marked; surface speckled with coarse 

 granules rough to the touch; length of intramedial area a little less 

 than half its anterior width. Front f our- toothed ; median teeth small, 

 thick, more prominent than in C. ornatus; outer teeth oblong-tri- 

 angular, extremities broader and more arcuate, tip curved upward. 

 Antero-lateral margin little arched; sinuses deep and rounded; teeth 

 long (from base to tip), trending forward, anterior margins concave, 

 the second to fifth, inclusive, having convex posterior margins; first 

 three or four teeth obtuse, the remainder sharp. Lateral spine 

 between 2 and 2.5 times the length of the preceding tooth. Costae of 

 manus prominent, with medium granules. Terminal portion of 

 abdomen of male unusually slender; penultimate segment wider at 

 proximal than at distal end, margins slightly concave; appendages 

 very short, overreaching the third (or coalesced) segment but little 

 or not at all. Abdomen of female much narrower than in any other 

 species; terminal segment much longer than wide. 



Color. — Dull brown, with areas of bluish black; claw brown above, 

 blackish blue and on inner side; last segments of swimming feet a 

 brighter brown. 



Measurements. — Male (42863), total length of carapace 48.7, 

 width of same 107, width at anterior base of lateral spine 87.4, fronto- 

 orbital width 39, width of front 12.6 mm. 



Range. — Bahamas and Florida Keys to State of Sao Paulo, Brazil. 

 Bermudas. West Coast of Africa, from Cape Verde Islands to Lobito, 

 Angola. 



Material examined. — 



BAHAMAS. — Alangrove Key, Andros Island; May 11, 1912; 

 Paul Bartsch; 1 male (45546). New Providence Island; 1886; 

 Albatross; 1 male (17948). Clarence Harbor, Long Island; July 14, 

 1903; B. A. Bean; 3 males, 1 female, 3 young (31091), from Geographic 

 Society of Baltimore. Bahamas; Dr. H. Bryant; 3 males, cotypes of 

 0. larvatus (5152, M. C. Z.). 



FLORIDA.— Ocean front, Broad Creek; December 17, 1906; 

 Pine and Bean; 2 young (33131). Caesars Creek; 1901; J. E. 

 Benedict, 1 male (25657). Near Indian Key; H. Hemphill; 3 males 

 (14032). Lower Metacumbe Key; December 4, 1906; B. A. Bean; 

 1 young female, soft shell (33153). Conch Keys; January 28, 1903; 

 Fish Hawk; 3 males (33456). Knights Key; December 16, 1908; 

 Bean, Pine and Vandergrift, Yacht Orian; 3 young (39191). Sum- 

 merland Keys; December 6, 1906; B. A. Bean; 1 young female 

 (33129). Key West: J. E. Mills; 3 male and female cotypes of 



