Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 63 



are very slightly incised/ The length of the carapace in the median 

 line is 83 mm., the maximum width, from tip to tip of the last antero- 

 lateral spine is 129 mm., the width of the body in the median line is 

 108 mm. The anterior three-fourths of the upper surface of the cara- 

 pace, the wing-like projection of the meral joint of the chelipeds, the 

 upper part of the outer face of the carpus, and the upper outer face 

 of the wing-like expansion of the palm are paved with coarse, round, 

 flattish granules, which occasionally form well separated, longitudinal 

 rows of flattish granules or tubercles on the posterior part of the 

 carapace, granules are also present but are much more widely scat- 

 tered ; a series of them form a midrib running diagonally in upon the 

 carapace from the apex of the postlateral tooth and of each two adja- 

 cent teeth on either side. The margins of the seven teeth of the wing- 

 like expansion and the posterior margin is coarsely beaded. The 

 frontal margin is narrow, two blunt, subtriangular teeth separated 

 by a wide, shallow U. The superior orbital margin is marked by two 

 closed sinuses. The regions of the carapace are very indistinctly 

 defined except that the uro-cardiac are separated from the branchial 

 by a well-defined, longitudinal depression on each side. The ptery- 

 gostomian region is densely hirsute. The male abdominal belt is tri- 

 angulate, the third to fifth segments inclusive fused into one ; the dis- 

 tal segment forming a exceedingly tapered triangle. 



The male chelipeds are equal except that one has a large, sub-basal 

 node on each the upper and lower fingers. The merus is produced 

 at the distal end into a flaring, cuff -like expansion which is cut into 

 four large, acute, triangulate teeth, each with beaded edge and acute 

 tip. The proximal two are heavily fringed with long, closed setae; 

 the four teeth successively increase in size from proximal to distal 

 and in line with the latter on the lower margin of the propodus there 

 is a beaded, triangulate, sub-basal tooth; the carpus has the upper 

 surface convex, granular, the upper margin straight, a single tooth 

 at the upper distal angle; the propodi are high, crested above, the 

 fingers distinctly deflected and they and the lower part of the palm 

 are paved with very large granules which also bead the lower margin. 

 There are a number of coarse flattish tubercles on the median and 

 upper parts of the outer face of the palm ; the upper crest or margin 

 is cut into eight or nine distinct teeth, which increase in height from 

 the proximal to the seventh tooth ; the right cheliped has a large sub- 

 basal node or tooth much on its outer side, and the related upper fin- 

 ger has a long, large tooth or lobe which interfits upon that of the 



