350 



BULLETIN 97, UNITED STAT'ES NATIONAL MUSEUM. 



ITCIDES OCCIDENTALIS (Ortmann). 



Plates 114-llG. 



IJca una Milne Edwards and Lucas, d'Orblgny's Voy. rAm6r. Merid., 



vol. G, 1S43, pt. 1, p. 23. Not Vca una Latreille. 

 Vca Ucvis Milne Edwaeus, Arch. Mus. Hist. Nat. Paris, vol. 7, 1S54, p. 1S5, 



pi. 10, figs. 1, la (type-locality, Guayaquil; type in Paris Mus.). Not 



Vca hicvis (lavis) Milne Edwards, 1S37. 

 Ocdi pleura occidcntalis Obtmann, Zool. Jabrb., Syst., vol. 10, 1SD7, p. 33G. 



New name for Uca lacvis Milne Edwards, 1854. 



Diagnosis. — Carapace of male one and one-half times as wide as 

 long. Jiigal region tuberculous. Lower margin of palm straight. 

 Second pair of legs of adult male the longest. 



Description. — Carapace of male much wider than in U. cordatus. 

 Lateral margin marked by a very faint tuberculate line. Orbits a 

 little higher than in U. eordatus. Jugal regions 

 tuberculous. Chelipeds not so strildngly un- 

 equal in this species, more elongate, especially 

 the propodal segments. Palms distinctly longer 

 than wide, their lower margins not dilated; the 

 spines of the inner surface and the margins are 

 smaller, more numerous, and more tuberculi- 

 form. Fingers very broad and flat, those of 

 the smaller chela not gaping but beset on the 

 inner surface with short, thick hair. Legs not 

 very long, resembling those of the f?male of 

 U. eordatus. The first three pairs are hairy 

 beneath ; the last pair is nearly naked. Ridges, 

 on the dactyl i smooth. 



Color. — Carapace olive-green, margined with 

 orange; claws, legs, and eyestalks deep red. 

 (Cok?r.) 



Measurements. — Male (2145), length of cara- 

 pace 54, width of same 80, length of larger pro- 

 podus 87 mm. 



Uahifat. — In the mud of mangrove swamps. They are taken at 

 low tide by thrusting one's arm into the deep holes in the mud. The 

 meat is of excellent flavor. (Coker.) 



JRange. — Lower California to Peru; Valparaiso (?). 

 Material examined. — 



San Salvador, Central America; Capt. J. M. Dow; male (2145). 

 Guayaquil, Ecuador; four specimens (Paris Mus.). 

 Las Vacas, in the region of Capon, Peru; mangrove swamps; Jan- 

 uary 23, 1908; Iv. E. Coker, collector; received from Peruvian Gov- 

 ernment; 1 male, 1 female (40490). 



FlC. 150. LCIUES OCCI- 

 DENTALIS, ABDOMEN OP 

 MALE (40490), NAT- 

 CUAL SIZE. 



