276 A. Alcock — Carcinological Fauna of India. [No. 2, 



behind the hepatic regions : the regions are well-delimited, but not 

 carinated or sharply raised ; and the surface is granular without any 

 very large spines or nodules. The rostrum is deflexed almost verti- 

 cally. The eyes are sunk in deep orbits with swollen margins. The 

 antero-lateral margins, and sometimes the postero-lateral, are closely 

 festooned or incised, but in an irregular manner. 



On either side of the gastric region is a deep hollow ; and on either 

 side of the front part of the cardiac region is a deep foramen. 



The chelipeds in the male are not twice the length of the carapace : 

 the arm is coarsely spinate along its convex inner border, and the 

 hand still more coarsely and bluntly spinate along its contorted upper 

 border. 



Ambulatory legs compressed, the 3rd to 5th joints having the 

 edges irregularly dentate, this being most marked in the case of the 

 last pair. 



The animal as a whole has a sort of boiled appearance. 



The species is very variable, and owing to frequent and extensive 

 incrustation with barnacles, foraminifera, etc., is very hard to describe. 



In the Museum collection are specimens from the Andamaus, 

 Mergui, Arakan, Ceylon, and Malabar coast. 



Lambrus (Parthenolambrus) beaumontii, n. sp. 

 Very near to Parthenope bouvieri and trigona, A. M.-Edw., (v. Rev. 

 et. Mag. Zool. (2) XXI. 1869, pp. 350-353). 



This species comes from deepish water, and is small and very 

 variable — the adult female, especially, being so unlike the male, that 

 if it were found apart, it would be considered distinct. 



The carapace is semicircular, the curve being broken (1) by the 

 hepatic regions, and (2) by the projecting middle lobe of the rostrum. 

 The elegantly curved antero-lateral borders are closely festooned by a 

 row of thin, sharp, laciniated teeth, the bases of which are fused to- 

 gether j of these teeth the first three, situated on the hepatic region, 

 are smaller than the others, which are of equal size, except the last, and 

 this forms the summit of the salient upcurved postero-lateral angle. 

 The postero-lateral borders are irregularly serrated, and there is a spinule 

 in the middle of the posterior border. The regions of the cai apace 

 are very salient and form three cariniform elevations : there is usually, 

 but not always, in the male, and seldom in the female, a recurved spinule 

 on the gastric region, in the middle line ; and generally in the male, 

 but seldom in the female, the conical cardiac region is surmounted by 

 one or two spinules. 



