256 



are free from these hairs. The carapace, when denuded, is flattened, slightly calcified, but 

 flexible, and of a more angular appearance than depicted by MierS; it wholly resembles 

 that of /^. irichopus (PI. 11, Fig. 6), except that the front is less advanced and much deflexed, 

 the lateral margins present a strong outward bulge in the middle and are much convergent 

 backward behind this bulge: even the various pits and faint grooves are wholly arranged in 

 the same way as in P. trichopus. 



The external maxillipeds entirely correspond with the figures of H. Milne-Edwards and 

 Burger : the antero-internal angle of the merus is obsolete, the propodus (which is best depicted 

 by Burger) is scarcely longer than the carpus, and the dactylus is very minute, by far not 

 reaching to the end of the propodus. As Burger rightly remarks Miers' figure of the external 

 maxillipeds is inexact, especially as regards the propodus. 



The basal tooth at the inner margin of the movable finger fits into a notch, which is 

 bordered by two crenulate prominences, at the opposite margin of the fixed finger. 



The dactyli of the walking legs are acuminate and hooked; they are subequal in length, 

 but yet they very slightly increase from the i^' to the 4''^ pair. 



The species was already stated by Burger to inhabit the pearl-oyster. 



Dimensions in mm. : 



Length of carapace . . . 5.2 

 Breadth of carapace . . . 5.7 



2. Pinnotheres trichopus n. sp. PL 17, Fig. 6. 



Stat. 261. Great Kei Island. Depth 27 m. i cf, in Mcleagi'ina. 



Found associated with the young 9 of the preceding species, the present example shows 

 the greatest affinity to P. villosulus, and I should certainly declare it to be the cf of this 

 species, were it not for a few differences, which perhaps are not sexual. The carapace is perfectly 

 alike in its shape to that of P. villosttlus, the angular course of the lateral margins being 

 particularly pronounced; the front is prominent, though in front view exactly agreeing with that 

 oi P.villosnhis, as depicted by Miers. Instead of the uniform woollyclothing found 

 in the preceding species, the carapace is wholly glabrous, flattened, rather hard. 



The external maxillipeds in their minute dactylus (fig. da) also resemble those of P. vil- 

 losjt/us, but the propodus is distinctly longer than the carpus. 



The chelipeds are provided with some patches of hairs. Palm of chela (fig. 6d) scarcely 

 longer than fingers, upper border hairy; back of dactylus near the base with a tuft of hairs, 

 placed in a shallow depression, tooth at cutting margin .strong, obliquely-directed backward and 

 fitting into a notch at the opposite margin, which is bordered by two teeth, the basal one of 

 which is large and strong, the distal one represented by a convex and crenulate bulging of 

 the margin of the fixed finger. 



The walking legs are short and again resemble those of P. villosuiiis, but their surface 

 IS naked and long, feathered hairs are inserted along the margins only. 

 The propodites are not elongate and all the dactyli subequal. 



108 



