1900.] A. Alcock — Oarcinological Fauna nf India. 335 



borders are sharply defined and granular. Front very distinctly bilobed, 

 prominent. 



Clielipeds in the male very unequal, the larger one being twice as 

 long as the carapace, its chief bulk being contributed by the hand, 

 which, with its large swollen polished palm and long crooked fingers 

 meeting only at tip, recalls that of Gelasimus. The smaller cheliped 

 (like the female clielipeds) is not much shorter than the larger one and, 

 like it, has the articulation of the wrist confined to a rather prominent 

 postero-inferior lobe of the hand, and the fingers longer than the palm : 

 the chief difference is that the palm is not enlarged and swollen and that 

 the fingers meet throughout almost all their extent. In both clielipeds 

 the surfaces of all the segments are smooth, and there are sharpish 

 granules along the borders of the arm and at the not very pronounced 

 inner angle of the comparatively slender wrist. 



The legs, like the fingers of the smaller cheliped, are fringed, but 

 not very thickly, with hair. The 3rd pair are very slightly the longest, 

 being twice the length of the carapace. The edges of the raeropodites 

 are famished with sharp granules and spi miles, these being abundant 

 in the case of the first 3 pairs and rather few on the 4th pair. In the 

 first 3 pairs also the carpopodites are of good length and subcylindrical, 

 and the dactyli straight and almost styliform; but in the 4th pair the 

 two terminal joints are compressed, the carpopodite being shortened and 

 the dactylus recurved. 



A male and a female from off Madras, 12 fathoms. The carapace 

 of the male is 11 millim. long and 12 millim. broad. 



Subfamily Pinnotherelin^. 

 Tetiuas, Rathbun. 

 Tetrias, Rathbun, Proc. U. S. Nat. Mus. XXI. 1898, p. 607. 



Carapace strongly calcified, broader than long, deep, subquadrang- 

 ular, dorsally flattish, anteriorly declivous, the regions faintly indic- 

 ated. 



Front between a third and a fourth the greatest breadth of the 

 carapace, its edge only deflexed, not directly united, to the epistome. 

 Orbits circular, small : eyestalks short, eyes small. The antennules 

 fold a little obliquely from the transverse. Antennas small, the flagellum 

 in the orbital hiatus. 



Epistome well defined : buccal cavern broadish, quadrilateral. 



External maxillipeds large, their palp about as large as their merus 



and ischium combined : ischium distinct, small ; merus very large, 



carpus large and triangular and articulating at the antero-external 



J. IT. 44 



