Q8 A. Alcock — Carcinological Fauna of India. [No. 1, 



Ooniosoma truncatum, A. Milne Edwards, Archiv. du Mus. X. 1861, pp. 380, 385, 

 pi. xxxiv. fig. 4. 



Gonioneptunus suhornatus, Ortmann, Zool. Jahrb. Syst. VII. 1893, p. 79, pi. iii. 

 fig. 9. 



The lobule of the basal antenna-joiat does not touch the front, so 

 that the flagellum stands in the upper part of the orbital hiatus. 



The length of the carapace slightly exceeds two-thirds of the ex- 

 treme breadth. 



Carapace covered with a dense shorf/ tomentum, moderately convex, 

 the regions ill-defined, crossed transversely by fiine granular ridges 

 which have the same disposition and are almost as faint as those of 

 C. crucifera : in addition there are small patches of granules on the 

 cardiac and inner part of the branchial regions. 



The front is cut into eight teeth {including the inner orbital 

 angles) of which the middle four are broadly triangular and almost 

 acute, while the pair on either side are sub-confluent and form a sort 

 of reduplicated inner supra-orbital angle, somewhat as in Nejjtunus 

 ( Lupocycloporus) whitei. 



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

 smallest, and the 6th — though more spine-like — is hardly more promi- 

 nent than those in front of it : all except the sixth are cut rather square, 

 have the free edge serrate, and are anteriorly acuminate — much as in 

 C lioplites. 



The posterior border of the dorsal surface of the carapace is 

 practically straight and forms an obtuse angle of junction with either 

 postero-lateral border. 



Except that the inner angle of the lower edge of the orbit is denti- 

 form and strongly prominent, and that the inner fissure of the roof is 

 wider, the orbits, and the eyes, are as in G. ornata. 



Chelipeds not much more than twice the length of the carapace, 

 their upper surface more or less granular, their under surface with 

 smooth- worn squamiform markings. Arm with two more enlarged and 

 one or two less enlarged spines on the anterior border, and one at the 

 far end of the posterior border. Wrist with 3 spinules on the outer 

 angle and a large spine at the inner angle. Hands inflated, strongly 

 6 or 7-costate— the costoe granular, and with 3 small spines on the upper 

 surface : very similar, in fact, to those of G. callianassa. The fingers 

 in the smaller cheliped are as long as, but in the larger cheliped are 

 shorter than, the palm. 



The merus of the last pair of legs is nearly as long as broad and 

 has the usual spine on the posterior border : the same border of the 

 propodite is smooth. 



