THE CANCROID CRABS OF AMERICA 131 



Callinectes tumidus Ordway, Journ. Boston Soc. Nat. Hist., vol. 7, 1863, p. 574 

 [9] (type-localities, Key West and Hayti; types from both localities in 

 M.C.Z.). — A. Milne Edwards, Crust. Reg. Mex., 1879, p. 226 (var. of C. 

 diacanlhus) .—Rathbvn , Proc. U. S. Nat. Mus., vol. VS, 1895 (1896), p. 

 359, pi. 18; pi. 24, fig. 6; pi. 25, fig. 5; pi. 26, fig. 5; pi. 27, fig. 5. 



Callinectes exasperatus Rathbun, Proc. Biol. Soc. Washington, vol. 11, 1897, 

 p. 150; Bull. U. S. Fish Coram, for 1900, vol. 2, 1901, p. 49. 



Diagnosis. — Lateral spine of carapace less than twice as long as pre- 

 ceding tooth. Male abdominal appendages reaching to middle of 

 penultimate segment. Frontal teeth triangular. 



Description. — Carapace very convex; depressions in center of 

 carapace deep; length of intramedial area no more than half its 

 anterior width. Frontal teeth four, triangular, tips rounded, the two 

 median larger and more prominent than in ornatus or marginatus but 

 not so far advanced as the lateral pair. Median epistemial tooth 

 short, exceeding the front but little if at all. Suborbital lobe broadly 

 rounded. Antero-lateral margin very arcuate; teeth broad, the first 

 six with very convex posterior margins and obtuse or subacute tips, 

 the fifth tooth the largest ; next two teeth acute or acuminate. Lateral 

 spine less than twice the length of preceding tooth. Spine at outer 

 distal end of arm and outer spine of wrist almost obsolete, being 

 replaced by blunt prominences. A blunt tooth or lobe on distal mar- 

 gin of the carpus just below the inner angle. Costae of manus 

 coarsely and sparingly tuberculate. Penultimate segment of male 

 abdomen similar in shape to that of C. ornatus, but much shorter; 

 appendages reaching to about middle of penultimate segment, tips 

 incurved. In the female abdomen the sixth segment is shorter than 

 the fifth and its margins are very arcuate. 



Measurements. — Males attain a width of 4% inches. Male (61426), 

 total length of carapace 62.7, width of same 117.5, width at anterior 

 base of lateral spine 113.2, fronto-orbital width 52.2, width of front 

 17 mm. 



Range. — From Florida Keys to State of Parana, Brazil. Bermudas. 



Material examined. — 



FLORIDA. — Long Key; along shore; H. Hemphill; 1 male, 1 

 female (14087). Key West; J. E. Mills; 2 males, cotypes of C. 

 tumidus (5159, M.C.Z.). Tortugas; C. F. Holder; 1 male (2143). 



CUBA. — Mariel; from branches hanging in river mouth; May 10, 

 1900; Palmer and Riley; 1 female (23832). 



JAMAICA.— 1884; Albatross; 1 male (18236). Montego Bay; 

 July 10, 1910; C. B. Wilson; 1 male (42853), with spine on right side 

 bifid. 



HAITI. — Gonaives; 1860; A. Hilchenbach; 1 female, cotype of C. 

 tumidus (5162, M.C.Z.). 



PORTO RICO.— 1899; Fish Hawlc:S&n Antonio Bridge, San Juan; 

 January 12; 1 male (24462). Catafio, San Juan Harbor, January 4, 



