Boone, Crustacea, Cruises of "Ara" and "Alva" 237 



and by the Prince of Monaco's expedition of 1902, at station 1311, 

 Saint Miguel, Azores, by the 'Trincess Alice" (Bouvier). 



Material examined: One large male and one medium size 

 female, dredged by the "Alva," off Fowey Rocks, Florida, bearing 

 289° true, four miles distant to bearing 273° true, two and one- 

 half miles distant, in 200 to 100 fathoms, November 29, 1935. 



Colour: In life this crab is a vivid "deep-sea" crustacean 

 scarlet, with the dactyli a darker russet ; the setae of the mouth- 

 parts are a golden brown. 



Technical description: The male has the following meas- 

 urements, all expressed in millimeters: carapace, 125 long; 150 

 maximum width, across the anterolateral spines; 95 minimum 

 width across the posterior margin ; frontal margin, 30 wide ; the 

 orbit, 25 wide. The cheliped is 282 long, the first ambulatory leg, 

 285, the second and third legs each 290 and the fourth leg, 285 

 long. The female carapace is 90 long, 110 maximum width, and 

 65 minimum width, with the chelipeds much smaller, measuring 

 only 95 millimeters long. 



The carapace is high, xanthid-form, about five-sixths as long 

 as the maximum width, very convex longitudinally, especially on 

 the anterior half, but only slightly so transversely, with the inter- 

 orbital margin one-fifth of the maximum width, produced into 

 a pair of median teeth, separated from each other by a concave 

 sulcus only two-thirds as wide as those separating the median 

 teeth from the broader preorbital angle, which is protruberant, 

 very conspicuous. The orbit is 30 millimeters wide, with the 

 upper margin concave, entire, faint lines indicating the two closed 

 sinuses; the superior postorbital angle is an acute, spinose tri- 

 angle. The anterolateral margin of the carapace is short, convex, 

 beaded and cut into four teeth, in addition to the postorbital tooth, 

 these being unequally distributed. The first tooth is a short point, 

 not quite so strong as the postorbital tooth from which it is 

 separated by a very shallow, concave arc of 12 millimeters width ; 

 the second tooth is 1.5 times as far from the second as the latter 

 is from the first, or is approximately midway the anterolateral 

 margin; the margin between the second and third teeth is cris- 

 tate, scarcely at all convex ; the fourth tooth is practically obsolete 

 in the large male specimen, being represented by a mere denticle 

 on the margin, located not quite halfway between the third and 

 fifth teeth ; the fifth tooth is acute, spinose, prominent. The post- 



