412 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Maron, Lagoon Madre, Mexico; Apr. 10, 1910; E. Palmer; 1 

 female y. (433G4). 



Tampico, Mexico; A. Dnges; 1 male (22311). 



Kingston Harbor, Jamaica; 1893; R. P. Bigelow; 1 male (22313). 



Mamanguape, Brazil; stone reef; June 20, 1899; Branner-Agassiz 

 Exped.; 1 male (25700). 



UCA PAN AMEN SIS (Stimpson). 



Plate 149. 



Gclasimus panamensis STTMPSON, Ann. Lye. Nat. Hist. New York, vol. 7, 

 1859, p. 63 (type-locality, Panama; type not extant). 



Gclasimus panamensis SMITH, Trans. Connecticut Acad. Arts and Sci., vol. 

 2, 1870, p. 139, pi. 4, fig. 5. 



Uca panamensis NOBILI, Boll. Mus. Zool. Anat. comp. R. Univ. Torino, vol. 

 16, 1901, p. 49, No. 415. 



Diagnosis. Antero-lateral angles prominent. Proximal end of 

 palm thick ; inner surface smooth, without tuberculate ridge. Lateral 

 margins of carapace angled. 



Description. Surface anteriorly uneven; narrow part of meso- 

 gastric region well marked; two frontal lobes high; a prominent 

 tubercle behind base of eyestalk. Carapace broadest at the antero- 

 lateral angles which are strongly produced forward in an obtuse 

 tooth, making the orbital margins very sinuous. Side margins 

 slightly concave or straight anteriorly, continued backward at a 

 very oblique angle ; the slight oblique or curved ridge at the posterior 

 extremity of the lateral margin is prominent but short. Front 

 prominent, broad, and rounded below as in U. pugilator. 



Large cheliped of male almost smooth. Arm and wrist sparingly 

 granulous. Supero-proximal portion of hand strongly bent over 

 horizontally ; infero-proximal angle thick, very prominently project- 

 ing backward so that the hand can not be bent outward further than 

 at a right angle to wrist and arm. Fingers flat, tapering; gape nar- 

 row, uniform; prehensile tubercles low, a large one near middle of 

 pollex. Inner surface of palm almost smooth, oblique ridge smooth 

 and subhorizontal. 



Measurements. Male (22181), length of carapace 12.4, width of 

 same 18 mm. 



Range. Gulf of Fonseca, Salvador, to Peru. 



Material examined. 



Gulf of Fonseca, Salvador; J. A. McNiel; 1 specimen (M.C.Z.). 



Punta Arenas, Costa Rica; February, 1907; P. Biolley and J. F. 

 Tristan; 1 male (39100). 



Taboga Island, Panama; J. Zetek: June, 1914; 1 male (48784). 

 Sept. 12, 1914; 2 females (48785). 



