92 A. Alcock — Carcinological Fauna of India. [No. 1, 



backwards and a little convex from side to side, flat in its posterior 

 third ; perfectly smooth and polished. The limits of the gastric region, 

 and its division into three sub-regions, are faintly apparent as mere 

 markings, not grooves ; and the fronto-orbital region is marked off by a 

 faint groove. 



The antero-lateral border is divided into four broad shallow lobes, 

 of which the first two are almost confluent ; from 1 the notch between 

 the second and third a short groove runs obliquely inwards on to the 

 carapace, and a still shorter one from the notch between the third and 

 fourth. 



Front much less than a fourth the greatest width of the carapace, 

 bilobed, the outer angle of each lobe separated from the supra-orbital 

 margin by a notch and groove. 



Chelipeds unequal, smooth and polished. 



Legs rather thick, smooth ; a few scattered hairs along the upper 

 border of the last three and along the lower border of the last two 

 joints, the dactylus also furred. The upper border of the meropodites 

 of all the legs, as well as of the arm, is microscopically serrulate or 

 crenulate. 



Colours in spirit pinkish yellow, fingers black with light brown 

 tips. 



In the Indian Museum are 3 specimens from the Andamans, (and 

 one from Samoa). 



This species exactly resembles a quite smooth and strongly- 

 inflated Xantho bidentatuSy and but that I have 4 specimens, represent- 

 ing both sexes and different ages, I should have regarded it as an 

 abnormality of that species. 



It also has a remarkable resemblance to the Xantho {Lachnopodus) 

 tahitensis figured and described by de Man in Zool. Jahrb. Syst. IV. 

 1889, p. 418, pi. ix. fig. 4; but it has not the row of strong spines along 

 the upper border of the meropodites of the chelipeds and legs, that are 

 characteristic of that species. 



18. Lioxantho asperatus, n. sp. 



Carapace very slightly convex fore and aft in its anterior two- 

 thirds, quite flat posteriorly and from side to side, very closely sharply 

 and uniformly granular everywhere except the posterior median portion, 

 where the granulation is visible only under a lens. The gastric region 

 is faintly delimited, a short bifurcating groove runs in from the frontal 

 notch, and two very faint grooves run in obliquely from the two notches 

 of the antero-lateral margins, but this is all the attempt at areolation 

 that exists. 



