1898.] A. Alcock — Carcinological Fauna of India. 199 



120. Pilumnus labyrinthitis, Miers. 



Pilumnus lahyrinthicus, Miers, Zool. H. M. S. "Alert," pp. 183 and 224, pi. xxii., 

 fig. C : and " Challenger " Brachyura, p. 161 : A. 0. Walker, Journ. Linn. Soc. 

 Zool. XX, 1836-1890, p. 110 ; Henderson, Trans. Linn. Soc. Zool. (2), V, 1893, p. 

 365. 



" In this carious form the surface of the carapace is everywhere 

 covered with raised curved or sinuated ridges, which are separated by 

 wide depressions ; the body and legs are covered with a dense close 

 brown pubescence ; from most of the ridges and from the teeth of the 

 antero-lateral margins of the carapace spring longer setae, and the 

 margins of the ambulatory legs are also fringed with longer hairs. 

 The frontal lobes, which are scarcely separated as usual by a median 

 notch, are rather broad, straight, and but little prominent ; the antero- 

 lateral margins are somewhat shorter than the postero-lateral, and are 

 armed with three distinct teeth, that of the exterior orbital angle being 

 obsolete. The orbital margin is somewhat thickened ; the epistoma 

 rather longer in proportion to its breadth than is usual. The basal 

 antennal joint is short, scarcely attaining to the sub-frontal process, 

 and not nearly reaching to the apex of the very prominent lobe at the 

 inner suborbital angle. The chelipeds are rather small and (like the 

 carapace) are densely pubescent, besides being clothed with longer 

 hairs ; the outer surface of the wrist or carpus is tuberculated beneath 

 the hairy coat ; the palm is clothed externally with long dense hairs ; 

 the upper margin of the palm bears three distinct tubercles ; the fingers 

 are slaty coloured, dentated on their inner margins and acute at their 

 apices. The ambulatory legs are densely hairy and of moderate 

 length." 



Not in the Indian Museum collection. 



121. Pilumnus (?) Isevis, Dana. 



Tilumnus Isevis, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 82, and U. S. Expl. 

 Expd. Crust, pt. i, p. 238 ; de Man, Journ. Linn. Soc. Zool. XXII, 1887-1888, p. 66, 

 pi. iv. figs. 1 and 2 : and Zool. Jahrb. Syst. VIII. 1895, p. 553. 



" Near P. levimanus, but broader. Carapace smooth and shining, 

 not areolate, rather convex : front emarginate, antero-lateral margin 

 three- toothed, the teeth minute and like spines, the posterior much the 

 smallest, outer angle of orbit not raised into a tooth. Anterior feet very 

 unequal, carpus smooth, not even faint tuberculate ; larger hand wholly 

 smooth, smaller sparsely hirsute, not at all tuberculate. Posterior 

 eight feet slender, somewhat hirsute." 



A single specimen from Mergui. It appears to me doubtful that 

 this species belongs to the genus Pilumnus. 



