THE GRAPSOID GRABS OF AMERICA. 385 



UCA HETEROPLEURA (Smith). 



Plate 161, figs. 1-4. 



Gelasimus hctcropleurus SMITH, Trans. Connecticut Acad. Arts and Sci., 

 vol. 2, 1870, p. 118, pi. 2, fig. 7; pi. 3, figs. 2-26 (type-locality, Gulf of 

 Fonseca ; type in Mus. Comp. Zool.). 



Vca platydactyla, var. stylifera OKTMANN, Zool. Jahrb., Syst., vol. 10, 1897, 

 p. 347 (part). 



Diagnosis. Front very narrow, spatuliform. Ocular stylet pres- 

 ent, as long as cornea. Oblique ridge on inner surface of palm ending 

 at carpal cavity. Pollex without strong tooth on basal half. 



Description (after Smith). Allied to U. stylifera. Carapace 

 slightly granulous. Branchial regions separated by deep sulci from 

 gastric and cardiac regions. The antero-lateral angle on the side of 

 the larger cheliped projects outwardly as a prominent obtuse tooth. 

 Lateral margins armed with a very marked line of sharp granules. 

 The ocular peduncle on the side of the larger cheliped terminates in 

 a slender, flattened stylet about as long as the cornea. 



Inner and outer margins of merus of large cheliped of male mi- 

 nutely denticulate. Carpus flattened and granulous. Basal portion 

 of propodus coarsely and thickly tuberculous outside, the tubercles 

 larger above; inner surface armed only with the oblique tubercular 

 crest running from the lower margin and terminating below the 

 middle. Fingers but little longer than palm ; prehensile edges armed 

 with a tooth a little way from the tip and nearly straight, gaping as 

 far as the teeth. Outer surface of fingers granulous or minutely 

 tuberculous, upper edge of dactylus tuberculous or denticulate. 



Abdomen of male more narrowed toward the tip, edges slightly 

 concave. 



Otherwise as in U. stylifera. 



Measurements. Length of carapace of a cotype male 15.8, width 

 of same 25 mm. 



Range. Known only from the type-locality. 



Material examined. Gulf of Fonseca, Salvador; J. A. McNiel; 

 1 male cotype (M. C. Z.). 



UCA INSIGNIS (Milne Edwards). 



Plate 161, figs. 5-15. 



Acanthoplax insignia MILNE EDWARDS, Ann. Sci. Nat., ser. 3, Zool., vol. 18, 



1852, p. 151, pi. 4, fig. 23 (type-locality, Chili; type in Paris Mus.); 



Arch. Mus. Hist. Nat. Paris, vol. 7, 1854, p. 102, pi. 11, figs. 1-16. 

 Gelasimus (Acanthoplax) exccllens GEKSTAECKER, Arch. f. Naturg., vol. 22, 



1856, pt. 1, p. 138 (type-locality, Veragua ; type in Berlin Mus.). 

 Gelaaimus armatus SMITH, Trans. Connecticut Acad. Arts and Sci., vol. 2, 



1870, p. 123, pi. 2, fig. 5; pi. 3, figs. 4-4d, male (type-locality, Gulf of 



Fonseca ; type in Mus. Comp. Zool. ) . 



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