26 



The orbits are somewhat imperfect ; their upper edge is deeply emarginate, 

 there is a wide gap at the inner canthus, and there are three very distinct sutures, 

 or sometimes actvial fissures, in the upper-outer wall. 



The antennules fold obliquely : in one Indian species their basal joint forms 

 a close-fitting operculum to the antennulary fossa. The antennae are very 

 distinct, and are loosely lodged in the inner canthus of the orbits. 



The buccal cavern is triangular and somewhat elongate : the exognath is 

 not dilated and its outer margin is almost straight : the triangular merus of the 

 endognath is about f the length of the ischium measured along its inner edge. 



Chelipeds either massive or moderately stout, of moderate length ; fingers 

 stout, about as long as the palm, which is not more — but is usually much less — 

 than half the length of the carapace. 



Although there is, as usual, some fusion among the abdominal terga, yet the 

 sutures are never wholly obliterated as they are in most other Leucosines. 



Bandallia lainellidentata, Wood-Mason. 



fiajtduHia iameWidentata, Wood-Mason, Illustrations of the Zoology of the 'Investigator' Crustacea, pi. v. 

 figs. 5, 5a, 5b : Alcock, Ann. Mag. Nat. Hist. May, 1894, p. 404, and J. A. S. B., Vol. LXV. pt. 2, 1896, p. 195. 



Carapace rhomboidal with the angles rounded off— subcircular ; its surface 

 behind the front covered with unequal-sized rather scattered pustulous tubercles ; 

 its regions well defined by grooves of some depth. 



Front bluntly bidentate. On the antero-lateral margin are three broad 

 lamelliform teeth, the front one of which is on the pterygostomian ridge (which 

 as usual forms the front part of the antero-lateral margin), and there is a fourth 

 similar tooth at the junction of the antero-lateral and postero-lateral margins. 

 The postero-lateral margins are full and the pustulous tubercles extend on to 

 them. 



The short posterior margin is elegantly bilobed, with a few pearly granules 

 round the lobes, and is overhung by the tip of the horizontal spine in which the 

 intestinal region culminates. 



The ventral surface of the carapace, the thoracic sterna, abdominal terga 

 (in the male) and external maxillipeds are all granular, the granules above the 

 base of the chelipeds being enlarged and pearly. 



The chelipeds in the male are about two-thirds as long again as the carapace, 

 and are massive and granular : at the distal end of the outer edge of the some- 

 what trigonal arm the granules are enlarged and almost spiniform, as are also one 

 or two at the distal end of the outer surface of the wrist. The hand is not much 

 longer than broad and hardly one-third the length of the carapace ; its outer edge 

 is in the form of a remarkably thin and deep crest : the fingers are stout and 

 rather longer than the hand, their outer (non-opposed) edges are cristiform. 



