20 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Diagnosis: Front bilobed, subtruncate; lobes arched. Carapace one 

 and one-third times as broad as long. Anterolateral margin greatly ex- 

 ceeding posterolateral margin. Orbits reduced to slits dorsally; eyes 

 small. Fingers of nearly equal length, gaping in a broad oval. First seg- 

 ment of palpus of third maxilliped inflated and horizontally com- 

 pressed. Margins of carapace and legs fringed with long, cylindrical, 

 golden hairs. 



Description: Carapace broadly oval, one and one-third times as 

 wide as long, strongly convex fore and aft, and smooth and bare to the 

 naked eye, except toward posterior lateral angles, which are traversed 

 by granular ridges. Surface dotted with scattered transverse punctae, 

 more numerous on the frontal and lateral portions of the carapace, 

 which bear clusters of short, forward-pointing, yellow hairs arising from 

 their granulate posterior margins. Granulation becoming more promi- 

 nent toward lateral margins, where are also found granules not asso- 

 ciated with pits. Anterolateral margin greatly exceeding posterolateral, 

 forming an unbroken arc spiked with sharp granules and fringed with 

 long, straight, cylindrical, yellow hairs. Front bilobed, edge granulate, 

 projecting, lobes arched and separated by a deep and narrow median 

 V from which a furrow extends to the gastric region, which is faintly 

 indicated. Orbits poorly developed dorsally, there being but an acute, 

 angular notch through which a minute black eye is visible. Eyestalks 

 subsessile, spinulous distally. Basal antennal article small, posteriorly 

 placed but touching front, and clearly separating antennulary pits from 

 orbit, flagellum projecting beyond front for less than half its length. 

 Antennules folding obliquely. External maxilliped fringed with long, 

 fine, yellow hairs, merus rhomboidal, outer angle rounded, inner angle 

 produced, first joint of palpus inflated and horizontally flattened, ap- 

 proximately one fourth as large as merus. 



Chelipeds equal in size. Carpus squarish with spinulous inner and 

 distal margins, and a distal fringe of yellow hairs. Manus compressed 

 at dorsal point of articulation with the carpus, in advance of which 

 the crest of the palm rises abruptly, surmounted by two rows of six 

 or seven spinules each, between which grow more yellow hairs. Palms 

 superficially smooth but microscopically granulate, bearing clusters of 

 yellow setae arranged in several rows. Color of fingers dark brown, 

 that of immovable finger continued a short distance on the palm, color 

 fading to white at tips. Fingers strongly curved, meeting at tips, leaving 

 an oval gape more than half as high as long. Each finger provided with 



