!9 21 ] Schmitt: The Marine Decapod Crustacea of California 279 



i 

 Key to the California Species op Uca 



I. Carapace very convex, semi-cylindrical. Male with an oblique stridulating 

 ridge near proximal lower corner of inner surface of large hand; abdomen 

 of male with third to sixth segments fused. 



musica, p. 280. 



II. Carapace moderately convex, not semi-cylindrical. Male without stridulating 

 apparatus; abdomen of male, inclusive of telson, seven- jointed. (Not 

 known north of False Bay.) 



crenulata, p. 279. 



Uca crenulata (Lockington) 

 Plate 49 



Gelasimus crenulatus Lockington, Proc. Calif. Acad. Sci., 7, 149, 1876 



(1877). 

 Gelasimus gracilis Eathbun, Proc. TJ. S. Nat. Mus., 16, 244, 1893. 

 Uca crenulata Holmes, Occas. Papers Calif. Acad. Sci., 7, 75, pi. 1, figs. 



7-9, 1900; Eathbun, H. A. E., 10, 190, 1904; Eathbun, Bull. TJ. S. 



Nat. Mus., 97, 409, pi. 146, 1918. 



Fig. 164. Uca crenulata; a, carapace; b, inner side of large hand (after 

 Holmes). 



Characters. — Carapace smooth, moderately convex; lateral margins nearly 

 parallel for a short distance behind the prominent, somewhat forwardly directed, 

 acute anterolateral angles, then converging; front nearly one-third the width 

 of the carapace. Hand of large cheliped of male finely granulated on outer 

 surface, inner surface with an oblique granulated or tuberculated ridge which 

 makes an obtuse angled turn in running from the lower to the upper margin. 

 Ambulatory legs pubescent; merus transversely rugose. Abdomen of male, 

 inclusive of telson, seven- jointed. 



Dimensions. — Length 10 mm., width 15 mm. (Eathbun). 



Type Locality. — Todos Santos Bay, near San Diego, California. 



Distribution. — From False Bay, San Diego County, California, to Gulf of 

 California (Eathbun). 



