ISOB.] A. Alcock — Garcinological Fauna of India. 69 



C. cullianassa has a considerable i-esemblance to G. affinis Daua, 

 fixDm which it may be distinguished by the following characters : — 



(1) the carapace is convex instead of nearly flat, the frontal teeth 

 differ, and the teeth of the antero-lateral border are serrulate : 



(2) the orbit is more dorsally inclined ; 



(3) theie are only two enlarged spines on the anterior border of the 

 arm : the hands are barrel -shaped and have only 3 spines on their upper 

 surface : 



(4) the 6th abdominal tergum of the male has the sides parallel 

 or almost divergent in two-thirds of their extent, whereas in C. affinis 

 they form gradually converging curves. 



35. Charyhdis (Goniosoma) rostrata, A. M. Edw. 



Goniosoma rostratum, A. Milne Edwards, Archiv. du Mus. X. 1861, pp. 379, 385, 

 pi. XXXV. fig 2 : J. R. Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 377. 



A small species : the length of the carapace in adults being some- 

 where about 20 millim., and the extreme breadth about 25 millim. 



Carapace about four-fifths as long as broad in the male, but not 

 quite so long in the female, moderately convex, crossed transversely by 

 granular ridges which are disposed as in G. crucifera, except that 

 theie is an additional one across the cardiac region (just as in G. a^nis 

 and G, callianassa), densely though finely pilose. 



Front as a whole decidedly prominent, cut into six teeth (not 

 including the inner supra-orbital angles), of which the middle two are 

 bluntly pointed and project far beyond the others, the next on either 

 side are broad and slope outwards, and the third on either side are small 

 narrow and nearly straight. 



Antero-lateral borders cut into six serrulate teeth, of which the 

 first is very acute and the last is more spinelike than the others. 



The posterior border of the dorsal surface of the carapace forms 

 a curve with the postero-lateral borders. 



Orbits without any particular dorsal inclination, the major diameter 

 not much less than half the width of the interorbital space, the inner 

 angle of the lower border dentiform, the lobule at the outer end of the 

 lower border distinct but not dentiform. 



A strongish granular ridge on the lobule of the basal antenna- 

 joint. 



Chelipeds less than twice as long as the carapace even in the 

 male, nearly smooth when denuded. Arm with 2 spines on the anterior 

 border and none on the posterior border. Wrist with a strong spine at 

 the inner angle and with two — less commonly three — spinules at the 

 outer angle. Hands inflated in the male, but not much so in the female. 



