THE GRAPSOID GRABS OF AMERICA. 415 



Range. Costa Rica. 



Material examined. Pnnta Arenas, Costa Rica ; Oersted, collector; 

 1 male holotype, 1 female (Copen. Mus.) ; 1 male paratype (31506). 



UCA HELLERI Rathbnn. 



Plate 151. 



Uca Jiclleri RATHBUN, Proc. Washington Acad. Sci., vol. 4, 1902, p. 277, pi. 

 12, figs. 3 and 4 (type-locality, Mangrove Point, Narboro Island; male 

 holotype, Cat. No. 24829, U.S.N.M.). 



Diagnosis. Orbits very oblique. Upper margin of palm without 

 carina; oblique ridge continued to upper margin. 



Description. A small species. Carapace moderately convex, de- 

 pressions shallow. Surface microscopically granulate, with more 

 distant punctae. Front less than one-third width of carapace; mar- 

 gin broadly rounded. Upper margin of orbit very oblique, scarcely 

 sinuous. Carapace widest at antero-lateral angles, which are rectan- 

 gular. Sides strongly convergent posteriorly, moderately sinuous. 



FIG. 170. UCA HELLEUI, MALE, X 3. a, DOIISAL VIEW OF HOLOTYPE; b, INXEK SUBFACB 



Or LARGER CHELA (25G66). 



Lower margin of orbit as well as greater part of eyebrow visible in 

 dorsal view. 



Outer surface of merus and carpus of large cheliped of male 

 crossed by short transverse lines of fine granules. Outer surface of 

 manus covered with granules larger above and very fine on outer 

 portion, somewhat reticulated, leaving small smooth patches. An 

 irregular pit behind union of fingers. Oblique ridge of inner surface 

 at angle of 45 to lower margin, turning at middle of palm at a right 

 angle or somewhat obtuse angle, and continued in an uneven line to 

 upper margin. Surface between ridges almost smooth. Fingers long 

 and slender, with a broad gape. Of the prehensile tubercles, there 

 is a larger one near middle of pollex, one at basal third or fourth of 



