CALIFORNIA STALK-EYED CRUSTACEA. 75 



Uca crenulata (Lock.) 



Gelasimus crenulatus Lockington, Proc. Cal. Acad. Sci., Vol. VII, 1877, 



p. 149. 

 Gelasimus vocator Kingsley (uot Herbst), Proc. Acad. Nat. Sci. Phila., 



1880, p. 147. 

 Gelasimus gracilis Kathbun M., Proc. IT. S. Nat. Mus., Vol. XVI, 1893, 



p. 244. 

 Uca vocator Ortmann (uot Herbst), Zool. Jahrb. Abth. f, Syst., Bd. X, 



1897, p. 352. 

 Uca gracilis Eathbun M., Proc. U. S. Nat. Mus., Vol. XXI, 1898, p. 603. 



Carapace smooth, couvex, with the H-shaped impressiou promiueut. 

 Frout wide. The lower edge of the superior orbital margin is arched 

 forward more strongly in the middle than the upper one. Lateral margins 

 nearly parallel for a short distance behind the prominent antero-lateral 

 angles of the carapace and then converging. Merus of the maxillipeds 

 much broader than long and much shorter than the ischium. Merus of 

 the large cheliped with the inner margin denticulated and the outer surface 

 crossed by transverse granulated rugse; carpus with the outer surface 

 granulated and the inner surface crossed by an oblique, usually granulated 

 ridge; hand finely granulated on the outer surface; inner surface with a 

 granulated or tuberculated ridge running from the lower margin to the 

 carpal groove; there is often a line of granulations extending from the 

 upper end of this ridge towards the upper margin of the hand; the carpal 

 groove is deep and covered by the overhanging upper edge of the palm; 

 fingers long and slender; the pollex is nearly straight or bent slightly 

 upwards, and truncated at the tip; dactyl longer than the pollex, curving 

 most strongly near the tip and generally armed with a tooth near the 

 middle of the inner margin. Ambulatory legs pubescent, the merus 

 transversely riigose. Abdomen of the male seven-jointed, the second 

 joint very short. 



Todos Santos Bay near San Diego (Lockington); La 

 Paz, Lower California! Guaymas! Sonora, Mexico! San 

 Luis Gonzales Bay! Todos Santos Bay, La Paz, Lower 

 California, San Diego (Miss Rathbun). 



The specimens of Miss Rathbun from La Paz and 

 San Luis Gonzales Bay I have seen, and also Mr. 

 Lockington's types. The other specimens examined 

 were in Lockington's collection. 



This species is closely allied to pugnax Smith, but is 

 distinguished by the more convex carapace, which is 



