184 U.S. NATIONAL MUSEUM BULLETIN 292 



Distribution. — Bermudas and southern Florida to Rio de Janeiro, 

 Brazil (Bermudas, Andros I., Cuba, Jamaica, Hispaniola, Puerto 

 Rico, Saint Thomas, Saint Croix, Martinique, Trinidad, Curagao, 

 Isla de Providencia) . 



73. Sesarma {Holometopus) roherd H. Milne Edwards 



Figures 60, mi-n 



Sesarma roberti H. Milne Edwards, 1853, p. 182 [type-locality: "Gor^e" (prob- 

 ably erroneous)]. 



Sesarma americana. — Pocock, 1889, p. 7 [not S. americanum De Saussure, 1858]. 



Sesarma brorneliarum Rathbun, 1896b, p. 143 [type-locality: Rio Cobre, Parish 

 of Saint Catherine, Jamaica]. 



Sesarma (Holometopus) roberti. — Rathbun, 1900a, p. 279; 1918, p. 312, pi. 91. — 

 Monod, 1956, p. 443, fig. 602-604. 



Sesarma (Holometopus) angustipes. — Rathbun, 1918, p. 311, pi. 90. — HartnoU, 

 1965, pp. 113, 115, 131-133, 144, 146, figs. 10b, 11b, d, 15a, b, table 6 [prob- 

 ably not S. angustipes Dana, 1852]. 



Diagnosis. — Carapace subquadrate, usually very nearly as long 

 in midline as wide, moderately convex anteriorly and laterally, 

 flattened and uneven on cardiac and intestinal regions, striate later- 

 ally, granulate elsewhere especially anteriorly; lateral margins con- 

 verging slightly anteriorly, without tooth posterior to outer orbital 

 angle, fronto-orbital distance less than maximum width of carapace; 

 front abruptly deflexed at postfrontal lobes, about half as wide as 

 carapace, margin with pronounced median sinus in dorsal view. 

 Eyes well developed, cornea wider than eyestalk. True ventral margin 

 of orbit largely replaced by hairy granulate shghtly convex ridge 

 accentuated posteriorly by deep groove, mesial end of ridge not 

 reaching anterolateral angle of mouth area. Third maxiUipeds with 

 oblique hairy ridge on merus, gaping widely, exposing mandibles. 

 Chelipeds subequal, carpus denticulate on flexor margin; palm with 

 rather sharp granules arranged in oblique rows dorsally; fingers 

 narrowly spoon tipped, extensor surface of movable finger nearly 

 smooth. Walking legs long and flattened, merus of third pereiopod 

 slightly more than one-third as wide as long, with sharp subdistal 

 tooth on extensor margin; dactyl about nine- tenths as long as extensor 

 margin of propodus. Denuded first pleopod of male terminating in 

 posterior view in rather broad flattened endpiece incised distaUy 

 into broad V (fig. 62/). A medium-sized species, maximum carapace 

 length in midluie about 27 mm. 



Color in life. — Ground color of carapace tan to dark brown 

 with cream to straw markings: hepatic and protogastric regions 

 with one to four small subcircular cream spots, and protogastric 

 region with larger spot adjacent to posteromesial margin; branchial 

 regions with four or five spots, often smaUer than those on hepatic 



