THE GRAPSOID CRABS OF AMERICA. 411 



Material examined. 



Colorado River, opposite mouth of "Hardy's Colorado" River, 

 Sonora, Mexico; Mar. 27, 1914; Dr. E. A. Mearns, U. S. Army; 32 

 males, 14 females (18292). 



Horseshoe Bend, Colorado River, Lower California; Albatross; 

 \ male holctype (17459). 



Guaymas, Mexico ; Capt. C. P. Stone ; 7 males, 4 females (M. C. Z.) . 



UCA SPINICARPA Rathbun. 



Plate 148. 



Uca spinicnrpa RATHBUN, Amer. Nat., vol. 34, 1900, p. 586 (type-locality, 

 Galveston; male type, Cat. No. 22183, U.S.N.M.). 



Diagnosis. Oblique ridge inside palm continued to upper margin 

 and very prominent. Tooth on inner face of carpus. Lateral mar- 

 gins of carapace angled. 



Description. Allied to U. speciosa. Orbital margin less oblique, 

 sides less converging. Front about two-sevenths width of carapace, 

 lower edge subtruncate. Anterior part of lateral margins straight 

 and subparallel. Antero-lateral angle a right angle. 



Merus of large cheliped of male granulate-rugose. Carpus sca- 

 brous-granulate on outer surface; inside there is a sharp spine or 

 tooth at the middle of oblique ridge. The palm is granulate outside, 

 granules increasing in size above, surface bent over almost hori- 

 zontally above. Inner surface with a strongly protruding tubercu- 

 late ridge, which bends at a right angle at the middle and is con- 

 tinued to upper margin; space between ridges smooth. Fingers one 

 and one-third times as long as palm, finely granulate; prehensile 

 edges irregularly tuberculate, a slightly larger tubercle near base of 

 dactylus and at middle of pollex. 



Measurements. Male (22183), length of carapace 9.5, width of 

 same 13.8 mm. 



Habitat. Mr. J. D. Mitchell says of the habitat of this species: 



Drain runs half a mile into the land from Matagorcla Bay; in the head of 

 this drain there are several shallow wells of fresh water for cattle, walled on 

 three sides. These crahs were all around these wells. 



Range. Alabama to Mexico. Jamaica. Brazil. 



Material examined. 



?Florida; U. S. Fish Comm.; 1 male (2G111). 



Near Mobile, Alabama; Jan. 29, 1883; C. L. Herrick; 3 males, 1 

 female (22312). 



Shores of Biloxi Bay, Mississippi; C. F. Baker; 1 male "(21684). 



Galveston, Texas; 1871; Boll, collector; 2 males, 1 female (types) 

 (22183). 



Drain near Matagorda Bay, Texas; fresh water; J. D. Mitchell; 1 

 male (25034). 



