THE CANCROID CRABS OF AMERICA 531 



feet much more thickly covered with a longer hairy coat. Carapace 

 flattened posteriorly but anteriorly sloping moderately toward the 

 margins. Regions sufficiently distinct. A transverse ridge on 

 frontal region, interrupted at middle. Surface naked along anterior 

 margins which are obtuse and thickened. Three long and strong 

 acute spines on antero-lateral margin, directed more forward than 

 outward, and in the same line a slender spinule in front of the first 

 and of the second principal spine. One principal and one or two 

 minor subhepatic spines. Front nearly horizontal, very little ad- 

 vanced; a large median V emargination separating two slightly 

 oblique lobes, each with a projecting lobule at inner end. Superior 

 margin of orbit unarmed, fissured at middle; outer angle tuber- 

 culiform, projecting laterally; inferior margin deeply bilobate; 

 lobes large, triangular, projecting; external hiatus well marked. 



Chelipeds very unequal, covered above and externally with short 

 spines more or less pyramidal in form; infero-distal half of outer 

 surface of palm naked; upper half of inner surface tuberculate and 

 granulate. Fingers channeled. Legs compressed, densely hairy; 

 merus spined above and with a larger spine at extremity ; carpus with 

 a large, smooth, procumbent, hornlike process lying on its upper side, 

 in front of which are three or four spines along the anterior margin. 

 All the leg spines have a tuft of long hairs inserted on one side near 

 the tip. 



Color. — Carapace milk white. Naked part of palm bright red or 

 purplish; fingers black. Feet a little red; nails brown. Hairs 

 russet. 



Measurements. — Male (24845), entire length of carapace 20.5, 

 width excluding spines 27.2, including spines 30, fronto-orbital 

 width 15, width of front 7.7 mm. 



Range. — From Bahamas and Miami, Florida, to Trinidad. 



Material examined. — 



BAHAMAS.— Green Turtle Cay; E. A. Andrews; 1 female (20711). 



Andros Island; in sponge; Frederick Stearns; 1 male (42794). 



Bahamas; Dr. Henry Bryant; 1 male (56820), received from 

 Boston Society of Natural History. 



FLORIDA.— Miami; G. M. Gray; 1 female (42142). 



Hawk Channel, 4:% miles W. by N. of Elbow Reef beacon; 2% 

 fathoms; barry, S.; temperature 20.5° C; February 19, 1903; station 

 7467, Fish Hawk; 1 male (60741). 



Duck Key ; in coral; December 19, 1912 ; Fish Hawk; 1 male (60740). 



Key West; January 28, 1901 ; B. A. Bean and W. H. King; 2 males, 

 3 females (24845). 



Tortugas; June 5-8, 1893; Biological Expedition, State University 

 of Iowa; 1 male (S. U. I.), 1 female (20025). 



