THE GEAPSOID CEABS OF AMEEICA. 411 



Material examined. — 



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

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

 males, 11 females (18292). 



Horseshoe Bend, Colorado River, Lower California; Albatross; 

 1 male holctype (17459). 



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



UCA SPINICARPA Rathbaiu 



Plate 148. 



Uca sphiwnrpa Kathbun, 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 Avidth of carapace, 

 lower edge subtruncate. Anterior part of lateral margins straight 

 and snbparallel. 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 ritlge, Avhich 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 oi 

 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 Matagorda Bay; in the head of 

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

 thi*ee sides. These crabs ^^'ere 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 (21GS4). 



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

 (22183). 



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

 male (25034). 



