28l 



groups near the orbit, but in a single row and assuming the shape of minute serrations further 

 backward; postero-lateral margins obsolete. Posterior margin convex, straight in the middle, 

 provided with a finely granulate rim. 



Antennulae rather robust, not capable of being retracted within the large fossae, which 

 are completely filled by the basal joint, a character of this species shared by Cauiatopsis Alcock, 

 to which also in genera! appearance a close resemblance may be noticed. Antennae standing 

 in the wide orbital hiatus, the two last joints of the peduncle free, subequal in length, little 

 longer than broad, flagellum long, consisting of about twelve joints, nearly hairless. Pterygostomian 

 regions granulate, like the carapace, pleural groove deep, disappearing backward above base of 

 cheliped, subbranchial regions hairy and granulate, perpendicular, with a large, entirely smooth 

 and glabrous, somewhat hollowed facet above bases of walking legs. Epistome present, but 

 strongly folded and short. Buccal cavity with the lateral margins somewhat divergent backward. 

 External maxillipeds widely gaping, convergent forward; ischium elongate, slender, lY» times as 

 long as wide, with a longitudinal, hairy groove; merus much smaller than ischium, 

 distinctly separated by a transverse suture, about half as long as ischium, 

 and little longer than broad, of an oval shape; palp normal, placed at summit of 

 merus, consisting of three joints, placed end to end, dactylus somewhat shorter than propodus; 

 e.xognath concealed in normal position, breadth about one-third of that of ischium ; not narrowing 

 distally and reaching only to suture between ischium and merus, flagellum long. 



Chelipeds unequal in both sexes, but much more so in the cf- Meropodite three-faced, 

 swollen, with a row of hairs along upper border and unarmed. Wrist small, polished, inner 

 angle not prominent. In the adult cf the right chela is much more bulky than the left: the 

 palm is greatly swollen, owing to a very much prominent bulge of the inner surface; the whole 

 chela is entirely smooth and polished, save some hairs at the fingers; these are not longer than 

 the palm and irregularly curved, leaving a wide space between them, but meeting hear tip, the 

 inner margins being for the most part unarmed, but where they fit together an obtuse tooth, 

 foliowed by some crenulations up to the acute tip, is observed (see Alcock's figure 30:). The 

 left chela of the c? is as long as the right, but somewhat lower and much less inflated; the 

 palm is shorter and the fingers are longer, nearly straight, fitting tightly together; finely crenulate 

 at inner margin; movable finger with a low quadrangular tooth near base, fixed finger with 

 4 — 5 erect teeth, in the interspaces of which lower teeth are placed. In the 9 ^"d in the young 

 cf the right chela resembles that of the left of the adult cf , but the left chela is remarkable by 

 being more elongate and lower, with the palm much shorter than the straight fingers, which 

 are deflexed and the crenulation of which is more clearly marked than in the right chela, 

 though the quadrangular tooth of the movable finger is wanting. 



The walking legs are slender and the first three pairs, which are subequal, measure 

 more than twice the length of the carapace ; the last leg reaches to about the middle of the 

 propodite of the preceding. Meropodite elongate, slightly narrowing distally, granulate at upper 

 surface, posterior and especially anterior margin armed with numerous erect teeth ; carpo- and 

 propodite, like the dactylus, of first and second pair covered with woolly hairs, those of third 

 pair almost naked and more slender than in the preceding pair. Dactylus slightly shorter than 



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