420 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



UCA FESTAE Nobili. 



Vca festae NOBILI, Boll. Mus. Zool. Anat. comp. R. Univ. Torino, vol. 16, 

 1902, No. 415, p. 51 (type-locality, Rio Daule Inferiore; type in Turin 

 Mus. ) . 



Diagnosis. Oblique ridge inside palm continued to upper margin. 

 Fingers very long. Carapace subcylindrical. 



Description (after Nobili). Carapace very wide, usually (but not 

 always) wider behind than between, the external orbital angles. 

 Sulci very deep. Orbital angle, a right angle and variable. 



Chelipeds enormously developed, four times width of carapace. 

 Merus and carpus rugose-granulose, the latter bearing inside two or 

 three large dentiform tubercles at its base. Hand very long, narrow, 

 rather cuneiform, smooth below, granulate above, the granules near 

 the articulation of the finger much larger and more spherical. On the 

 inner surface, an angled crest analogous to that in U. speciosa and its 

 allies. Surface between crests smooth. Fingers 3 or 4 times as long 

 as palm, very slender, twisted and terminating in a point. Dactyl 

 longer than pollex, denticulate in proximal third only, pollex dentic- 

 ulate throughout. 



Merus joints of legs of moderate width. 



Measurements. Male, Rio Daule, length of carapace 12, width of 

 same 18 mm. 



Locality. Ecuador: Rio Daule Inferiore, in brackish water. 



Affinity. Differs from U. stenodactylus, in having the palm nar- 

 rower, less narrowed toward the base, fingers longer and more curved, 

 abdominal segments all free. 



UCA LEPTODACTYLA Rathbon. 



Plate 156. 



Gelasimus leptodactylus GUEBIN, MS. 



Gelasimus stenodactylus KINGSLEY, Proc. Acad. Nat. Sci. Philadelphia, 

 1880, p. 154 (part). 



f Gelasimus poeyi GUERIN MS. (See Kingsley, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1880, p. 154.) 



Uca stenodactyla OBTMANN, Zool. Jahrb., Syst., vol. 10, 1897, p. 356 (part). 



Uca leptodactyla RATHBUN, in Rankin, Ann. New York Acad. Sci.,' vol. 11, 



1898, No. 12, p. 227 (type-locality, near Ft. Montagu, Nassau, N. P.; 

 type, Cat. No. 22315, U.S.N.M.). 



fUca gibbosa NOBILI, Boll. Mus. Zool. Anat. comp. R. Univ. Torino, vol. 14, 



1899, No. 355, p. 5. 



Diagnosis. Carapace widest at antero-lateral angles, subcylindri- 

 cal. Oblique ridge inside palm continued to upper margin. Fingers 

 slender, one and one-half times as long as palm. Third to sixth ab- 

 dominal segments in male fused. 



