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U.S. NATIONAL MUSEUM BULLETIN 29 2 



Metasesarma rubripes. — Rathbun, 1918, p. 319, pi. 94. 



Aletopograpsus brasiliensis (A. Milne-Edwards ms.) Rathbun, 1918, p. 319 [type- 

 locality: Florianopolis, Estado de Santa Catarina, Brazil?]. 



Diagnosis. — Carapace trapezoidal, about four-fifths as long in 

 midline as wide, slightly convex both longitudinally and transversely, 

 distinctly striate laterally, nearly smooth elsewhere; lateral margins 

 somewhat concave, converging strongly posteriorly, unarmed posterior 

 to outer orbital angle, fronto-orbital distance representing maximum 

 width of carapace; front sharply deflexed at postfrontal lobes, widen- 

 ing distally, about seven-tenths as wide as carapace, margin with 



Figure 56. — Metasesarma rubripes, male (carapace length 16.0 mm) from Paparo, Venezuela 



(H. Pittier). 



shallow median sinus, faintly quadrilobate, in dorsal view. Eyes well 

 developed, cornea about as wide as eyestalk. Ventral margin of orbit 

 not well defined, produced at mesial end into large lamellate lobe 

 nearly touching frontal margin, paralleled ventrally by two sharp 

 minutely denticulate carinae, dorsal one longer and curving mesially 

 to anterolateral angle of mouth area. Third maxillipeds with oblique 

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

 subequal, carpus unarmed except for few denticles on flexor margin; 

 palm with few low oblique crenulate ridges dorsally; fingers pointed, 

 very narrowly spoon tipped, movable finger bearmg scattered sharp 

 granules on extensor margin. Walking legs broad and flat, merus of 

 third pereiopod nearly half as wide as long, with sharp subdistal 



