18 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Measurefnents: Male holotype: greatest length of carapace 5.4 

 mm., greatest width 7.3 mm., length of major chela 6.4 mm. Female 

 allotype: length 3.9 mm., width 5.4 mm. 



Diagnosis: Front oblique, lateral lobes prominent. Second antero- 

 lateral tooth low and fused with first, their combined width little 

 greater than that of third tooth. Fourth tooth laterally directed, tip 

 tuberculiform. Fifth tooth reduced, almost postlateral in position. Major 

 chela of adult male without superior crest. 



Description: Regions of dorsal surface of carapace separated by 

 conspicuous furrows and bearing elevate, transverse ridges. Front ad- 

 vanced, edges thickened, granulate, oblique, a shallow V meeting the 

 median epigastric groove, a prominent lobe at the outer extremities. 

 Inner supraorbital tooth distinctly separated from frontal lobes; space 

 between closed fissures of orbit low and broad, scarcely attaining the 

 level of the outer orbital tooth, which is narrow at base, acute at tip, 

 and outwardly directed. Second anterolateral tooth obsolescent, fused 

 with the first, the two together occupying little more than the width of 

 the third. Third tooth largest, its anterior margin transverse and bearing 

 a suggestion of a denticle at its base, the outer margin straight and pos- 

 teriorly directed except at base, where it bends sharply inward. Fourth 

 tooth tuberculiform at tip and laterally directed, its anterior margin 

 shorter than the posterior; carapace widest at this point. Fifth tooth re- 

 duced and almost postlateral in position, although not so much as in H. 

 caribbaeus, and also laterally directed. Posterolateral margins strongly I 

 converging. Principal elevations of the carapace bearing sparse hairs and 

 located, in the order of their prominence, as follows: mesobranchial, J 

 cardiac, metabranchial, protogastric, mesogastric, and epibranchial. 



Chelipeds dissimilar but of nearly equal proportions, the larger 

 strongly inflated, smooth under low magnification, and without the su- 

 perior crest common in the genus. Carpus also smooth and bare, except 

 for a prominent spine at anterointernal angle, a lump toward the distal 

 end, and a faint outer furrow. Minor chela more compressed than major, 

 its carpus similar. Color of fingers dark brown with white tips; color 

 of fixed finger of major claw terminating abruptly a very little behind 

 the interdigital sinus, that of minor claw extending farther on the hand. 

 Movable finger with a large basal tooth and strongly curved downward 

 to meet the upturned tip of the fixed finger. Movable finger of minor 

 chela long, curved, and slender. The fixed finger of this claw is missing 

 in the type specimen. 



