1898.] A. Alcock — Car cinological Fauna of India. 91 



Key to the species of the genus Lioxantho. 

 I. Chelipeds uneqnal, outer angles of front separated from 

 the snpra-orbital margin by a notch ; regional markings 

 of carapace almost obsolete ... ... ... L. tumidus. 



II. Chelipeds equal, outer angles of front fused with supra- 

 orbital margin : — 



i. Carapace chelipeds and legs smooth as wax ... L. punctatus. 

 ii. Carapace chelipeds and legs uniformly closely 



and finely granular ... ... ... L. asperatus. 



16. Lioxantho punctatus, (Edw.) 



Xantho punctatus, Milne Edwards, Hist. Nat. Crust. I. 396 : A. Milne Edwards, 

 Nouv. Archiv. du Mus. IX. 1873, p. 199, pi. vii. fig. 6: Miers, Challenger Brachyura, 

 p. 125: de Man, Zool. Jahrb. Syst. IV. 1889, p. 420, and Notes Leyden Mus. XII. 

 1890, p. 52, pi. iii. fig. 1. 



Liomera punctata, Miers, Zool. H. M. S. Alert, pp. 517, 528: de Man, Archiv. fur 

 Naturges. LIU. 1887, i. p. 238: J. R. Henderson, Trans. Linu. Soc. Zool., (2) V. 

 1893, p. 354: Ortmann, Zool. Jahrb., Syst. VII. 1893-94, p. 451. 



Carapace moderately convex in the anterior two-thirds, flat post- 

 eriorly, its surface smooth. The gastric region is fairly well defined 

 antero-laterally, and the fronto-orbital region marked off, by distinct 

 grooves ; and two short grooves (of which the anterior is the longer) 

 pass in obliquely from the notches between the 2nd and 3rd, and 3rd 

 and 4th lobes of the antero-lateial margin ; but this is all the areola- 

 tion that exists. 



Antero-lateral border moulded into four broad shallow lobes, of 

 which the first two are almost coalescent. 



Front bilobed, the outer angle of each lobe fused with the supra- 

 orbital border, as in Xantho impressus and as in no other Indian species 

 of Xantho : the width of the front is about a fourth the greatest breadth 

 of the carapace. 



Chelipeds equal in botli sexes, perfectly smooth, although a very 

 indistinct groove sometimes runs about half way along the outer surface 

 of the hand near the upper border. 



Legs thickish, smooth, the dactylus with some fur and a few short 

 hairs. 



Colours in spirit ; pinkish yellow or buff, with small red spots on 

 carapace, and ill-defined pinkish-brown patches on chelipeds and legs ; 

 fingers black, with light brown tips. 



In the Indian Museum are 3 specimens from Ceylon, (as well as 8 

 from Mauritius and 2 from Samoa). 



17. Lioxantho tumidus, n. sp. 

 Carapace in its anterior two-thirds strongly convex from before 



