346 



BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



FIG. 157. CAKDISOMA CRAS- 

 SU.M, ABDOMEN OF MALE 

 (4SS09), XATCUAL SIZE. 



stout, straight process, which is soft and flexible, and clothed at the 

 extremity with hair. 



The legs are conspicuously hairy. 



Measurements. Male (40501), length of 

 carapace 100, width of same 128, length of 

 propodus of larger chela 142, height of same 

 72 mm. 



Range. From San Jose and La Paz, 

 Lower California, to Peru. Alcock gives 

 " Chili " in the distribution of the genus 

 Cardisoma. If this be correct, it is probably 

 C. crassum that is found there. 

 Material examined. 

 San Jose, Lower California (M. C. Z.). 

 La Paz, Lower California; L. Belding; 

 1 male, 1 female (4658). 



Cape St. Lucas, Lower California; J. Xan- 

 tus; 2 males (2137). 

 Acapulco, Mexico (M. C. Z.). 

 Panama Canal Zone; July 27, 1915; J. 

 Zetek; 1 male (48809). 

 Cristobal, Panama; Mar. 13, 1912; Meek & Hildebrand, Smith- 

 sonian Biol. Survey of the Panama Canal; 1 female (4GG92). 



Darien; Dr. Enrico Festa, collector; received from Turin Mus.; 

 1 male (20072). 



Mouth of River Tumbes, Peru; Feb. 12; R. E. Coker; received 

 from Peruvian Government; 1 male (40501). 



Genus UCIDES Rathbun. 



Uca LATKEILLE, Nouv. Diet. Hist. Nat., vol. 35, 1819, p. 96; type, U. uca 



(Linnaeus, 1767) cordata (Linnaeus, 1763). 

 Ucidcs RATIIBUN, Proc. Biol. Soc. Washington, vol. 11, June 9, 1897, p. 154; 



type, U. cordatus (Linnaeus). 

 (Edivlciira ORTMANN, Zool. Jalirb., Syst., vol. 10, 1897, p. 334; type, O. cor- 



data (Linnaeus). 



Carapace shaped much as in Cardisoma. Pterygostomian regions 

 for the most part naked. Fronto-orbital border somewhat more 

 than half, and the narrow, convex, deflexed front about one-sixth, the 

 greatest breadth of the carapace. Orbits deep, the outer angle in- 

 conspicuous, the inner angle remote from the front but not denti- 

 form. Orbits not very much larger than the eyes. 



Antennules oblique, partly hidden by the front; interantennulary 

 septum rather narrow, triangular. The basal antennal joint is 

 longer than broad, and lies obliquely across the orbital hiatus; fla- 

 gellum short. 



