. Bulletin - United States National Museum. Science. 158 NATIONAL MUSEUM BULLETIN 29 2 Geograpsus occidentalis Stimpson, 1860, p. 230 [type-locality: Cabo San Lucas, Estado de Baja California, Mexico]. Grapsus (Orthograpsus) hillii [by implication] Kingsley, 1880, p. 194 [type- localities: West Indies and Key West, Florida]. Diagnosis.—Carapace subrectangular, about four-fifths as long as mde (females slightly broader), flat centrally and posteriorly, curving downward anteriorly and laterally, striations distinct later- ally and anteriorly, absent on most of mesogastric region and on card
. Bulletin - United States National Museum. Science. 158 NATIONAL MUSEUM BULLETIN 29 2 Geograpsus occidentalis Stimpson, 1860, p. 230 [type-locality: Cabo San Lucas, Estado de Baja California, Mexico]. Grapsus (Orthograpsus) hillii [by implication] Kingsley, 1880, p. 194 [type- localities: West Indies and Key West, Florida]. Diagnosis.—Carapace subrectangular, about four-fifths as long as mde (females slightly broader), flat centrally and posteriorly, curving downward anteriorly and laterally, striations distinct later- ally and anteriorly, absent on most of mesogastric region and on cardiac, intestinal, and mesial portions of branchial regions; lateral margins converging anteriorly, with subrectangular tooth posterior to outer orbital angle, fronto-orbital distance less than nine-tenths of maximum width of carapace; front strongly depressed but not sharply deflexed at postfrontal lobes, about two-fifths as wide as Figure 48.—Geograpsus lividus, male (carapace length mm) from Dominica station 6. margin nearly straight in dorsal view. Eyes well developed, cornea slightly wider than eyestalk. Ventral margin of orbit sharply pro- duced, denticulate, curving ventrally to anterolateral angle of mouth area. Third maxUlipeds without oblique hairy ridge, \videly gaping, exposing mandibles. Chelipeds subequal, carpus armed with blunt triangular tooth on flexor margin; palm tuberculate dorsally; fingers pointed, not distinctly spoon tipped, extensor margin of movable finger finely and irregularly tuberculate. Walking legs broad and flattened, merus of third pereiopod, about half as wide as long, with smaU obscure subdistal tooth on extensor margin; dactyl slightly longer than extensor margin of propodus; carpus and propodus of third pereiopod bearing long stout dubbed hairs. Denuded first pleo- pod of male terminating, in posterior view, in subtruncate flattened endpiece notched in lateral half (fig. 52a). Color 'pattern characterized by large dark ir
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