Garcinolotjical Fauna of India. 307 



In the Indian Museum is a single specimen from tlie An damans : 

 its carapace is 4 millim. long and 7 raillim. broad. 



This species differs but little, except in the sub-quadrilateral sliape 

 of the thorax, from the Lihystes nituhis described and figui'ed by M. A. 

 Milne- Ed wards. 



Catoptrds, a. M. Edw. 



Caloptrus, A. Milne Edwards, Ann. Sci. Nut. Zool. (5) XIII. 1870, p. 82 ; 

 Ortmaun, Zool. Jahrb., Syst. VII. 1893-94, p. fiSS. 



Gonioeaphyra, de Miiu, Archiv fur Naturges. LIII. 1887, i. p. 339. 



Ciirapace transversely elongate-elliptical, without distinction of 

 regions, moderately convex in both directions. 



The extent of the fronto-orhital border is vastly less than the 

 greatest breadth of the carapace, the antero-laleral borders, which are 

 serrated, are therefore well curved. Front straight, slightly notched 

 in the middle line, not distinctly separated from the supra-orbital 

 angles, less than a third the greatest breadth of the carapace. 



Orbits shallow, their upper border entire. The autennal flagellum, 

 which is of good length, stands in the orbital hiatus. The antennules 

 fold transversely. 



Buccal cavern, palate, and external maxillipeds as in Eucrate. 



Chelipeds much as in Lihystes. Legs as in Libystes, except that 

 the last pair, though they have the dactylus compressed and ciliated, 

 are never paddle-like. 



Abdomen as in Lihystes. 



Distribution : Indo-Pacific (Mauritius to Samoa). 



Catoptnis really differs from Lihystes only in the form of the merus 

 of the external maxillipeds and of tlie last pair of legs, Avhich are not 

 paddle-like as they are in one species of Libystes. S\ f t 



10. Catoptrus nitidiis, A. II. Edw. — i /^tj>.<^^* 



Catoptrus niddus, A. Milne Edwards, Ann. Sci. Nat., Zool., (5) XIII. 1870, 

 p. 82 : de Man, Notes Leyden Mus. XII. 1890, p. 67 : Ortmacn, Zool. Jahrb., SysU, 

 VII. 1893-94, p. 687. 



Gonioca'phyra truncatifrons, de Man, ArcLiv fur Nat. LIII. 1887, p. 339, pi. xiv. 

 fig. 1, and Notes Leyden Mus. XII. 1890, p. 67. 



Goniocaphyra sp., Zehntner, Kev. Suisse Zool. II. 1894, p. 163, pi. viii. fig. 12, 

 12a. 



Carapace, length less than tuo-lhirds its breadth, perfectly smooth 

 and sliining except for some fine granulation near the autero-latei al 



borders. 



64^ 



