THE GRAPSOID CRABS OF AMERICA. 



53 



Description. Carapace about three-fourths as long as broad, con- 

 vex in both directions, antero-lateral teeth upturned. Regions deeply 

 separated; a transverse granulate ridge on the hepatic and on the 

 epibranchial regions; some granular prominences on the postero- 

 lateral regions. Front prominent, two-sevenths as wide as the cara- 

 pace, convex, a narrow median notch. The second lateral tooth is 

 low and rounded and fused with the first tooth; the three last teeth 

 are strong and prominent, the third the broadest, the fifth the most 

 acute. 



The chelipeds are very stout ; the merus is as high as it is long and 

 has a stout subdistal spine above; the upper surface of the wrist is 

 as broad as it is long, with a blunt, stumpy inner tooth, and a 

 groove along the anterior margin; anterior 

 outer angle pronounced. Palms a little un- 

 equal, the lower portion of the outer surface 

 flattened, upper aspect broad, sloping, the 

 proximal angle of the upper margin forming 

 a prominent lobe ; the lower margin of the pro- 

 podus is lightly sinuous, the pollex very broad 

 at its base and tapering rapidly to the tip; 

 dactylus much bent down; both digits irregu- 

 larly toothed, leaving a narrow gape when 

 closed. 



Measurements. Male holotype, length of 

 carapace 21.4, width of same 27.9 mm. 



Variations. The type is much larger than 

 any other specimens examined; half -grown 

 specimens have a wider and less prominent 

 front, and a smoother carapace which is wider in its posterior part. 



Range. From west coast of Florida to Rio de Janeiro, Brazil.. 

 Shallow water to 7 fathoms. 



Material examined. 



Marco, Florida; H. Hemphill; 1 female ovig. (17801); 1 female 

 (18273). 



West Channel, entrance to Key West; Feb. 13, 1902; Fish Hawk: 

 Beacon 2 to Sand Key Light, 48 20' 00" to Key West Light, 77 07' 

 00"; 7} fathoms; Co. S.; temp. 20.2 C.; station 7272; 2 males, 1 

 female ovig. (45952). Beacon 2 to Sand Key Light, 40 11' 00" to 

 Key West Light, 119 47' 00"; 7$ fathoms; Co. S. br. Sh.; temp. 

 20.2 C.; station 7273; 4 males, 6 females (3 ovig.) (45950). Key 

 West Light to N. W. Passage Light, 67 35' 00" to Beacon 3, 103 c 

 20' 00"; 6f fathoms; Co. S. brk. Sh.; temp. 19.8 C.; station 7274; 1. 

 male, 1 female ovig. (45949). 



Jamaica (P. W. Jarvis collection). 



FIG. 22. EUCRATOPSIS 

 CRASSl.MANUS, FEMALE, 



(17801), OUTEU MAX- 

 ILLIi'ED, X 8. 



