64 BULLETIN 129^ UNITED STATES NATIONAL MUSEUM 



Genus ANASIMUS A. Milne Edwards 



Anasimus A. Milne Edwards, Crust. R^g. Max., 1880, p. 350; type. A, 

 fugax A. IMilne Edwards; Bull. Mus. Comp. Zool., vol. 8, 1880, p. 9. — 

 Rathbun, Bull. U. S. Fish Comm., vol. 20, for 1900, pt. 2 (1901), p. 58. 



Carapace pyriform or ovate, very convex, armed with spines; 

 rostrum simple, pointed, ascending. Eyes large. Postorbital spine 

 usually prominent. Supraorbital spine present. Basal article 

 of outer antenna long and narrow, terminating in a spine. Exognath 

 of outer maxillipeds broad posteriorly, very narrow anteriorly; 

 merus of endognath narrow at its base, deeply cut at its antero- 

 internal angle for insertion of palpus, and strongly auriculate behind 

 insertion. Sternum forming a considerable angle with the plane 

 of the maxillipeds. Chelipeds of moderate length, the palms swollen 

 in male; fingers long and slender, of nearly equal length and more 

 than twice the length of carapace; dactyli long. 



Inhabits the Atlantic coast of America from South Carolina to 

 Cape Frio, Brazil. 



KEY TO THE SPECIES OF THE GENUS ANASIMUS 



A'. Carapace much longer than broad. 



B^ Three spines in longitudinal row on branchial region. Interantennular 



tooth well developed fugax, p. 64. 



B^. Two spines in a longitudinal row on branchial region. Interantennular 



tooth shallow latus, young, p. 65. 



A^. Carapace nearly as broad as long, subcircular latus, old, p. 65. 



ANASIMUS FUGAX A. Milne Edwards 



Plate 23, figs. 5 and 6; plate 211 

 Anasimus fugax A. Milne Edwards, Crust. R6g. Mex., 1880, p. 350, pi. 31 

 A, figs. 1-ld (type-localities, near Santa Cruz, 115 fathoms, and near Bar- 

 bados, 56 and 82 fathoms; cotype from Santa Cruz in Paris Mus.; 2 

 cotypes from Barbados in M. C. Z.); Bull. Mus. Comp. Zool., vol. 8, 1880, 

 p. 9.— Rathbtjn, Bull. U. S. Fish Comm., vol. 20, for 1900, pt. 2 (1901), 

 p. 59 (part). — A. Milne Edwards and Bouvier, Mem. Mus. Comp. Zool., 

 vol. 47, 1923, p. 366, text-fig, 16. 



Diagnosis. — Carapace much longer than broad. -^ A longitudinal 

 series of three spines on branchial region. Interantennular tooth 

 well developed. 



Description. — Three erect median spines on carapace, one gastric, 

 one cardiac of equal size, one intestinal, smaller. A spine on first 

 article of abdomen. Protogastric lobes each armed with a spine, 

 three spines or tubercles in a longitudinal series on branchial regions. 

 Surface of carapace irregularly granulate, rostrum short and spinu- 

 lous above. Supraorbital border armed with a spine. Basal article 

 of antenna with a spine near its middle pointing obliquely downward 

 and forward; flagellum long. Interantennular septum prolonged in 

 a strong triangular tooth. Chelipeds of male feeble, clothed with 



