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



little less than three times the length of the carapace : the arms and 

 hands are depressed trigonal, and the fingers small : the arm has its 

 inner edge sharply tuberculate, its outer edge strongly 4 or 5-spinate, 

 its lower edge beaded, its upper surface with a row of 4 or 5 large 

 granules : the wrist has three strong spines along its outer edge : the 

 hand has its inner edge sharply 9 to 11-dentate, its outer edge very 

 strongly 6 to 8-spinate, with small spinules alternating with the large 

 spines, and its lower edge sharply and finely beaded. The ambulatory 

 legs are perfectly smooth. 



All our specimens are typical according to Adam and "White's 

 figure. This species is common at the Andamans. 



Lamhrus (Aulacolambrus) curvispinis, Miers. 



Lambnis curvispinis, Miers, Ann. Mag. Nat. Hist., Vol. IV. 1879, p. 24; and 

 'Challenger ' Brachyura, p. 98. 



This species, which Miers in his latest notice of it considers to be 

 one of the numerous varieties of L. hoplonotus, resembles the latter 

 species in every particular except (1) that the rostrum ends in a little 

 bacillar spinule ; (2) that the antei*o- lateral borders of the carapace 

 instead of being crenate are powerfully spinate ; (3) that the spiues 

 along the inner edge of the palm are strongly hooked upwards and 

 outwards ; and (4) that the inner surface of the arm bears a row of 

 spinules. 



This species, or variety, which is twice the size of L. hoplonotus, is 

 also very common at the Andamans. 



Lambrus (Aulacolambrus) whitei, A. M.-Edw. 



Lamhrus carinatus, Adams and White (nee Edw.), ' Samarang ' Crust., p. 27, pi. v. 

 fig. 3. 



Lambrus whitei, A. Milne-Edwards, Nouv. Archiv. du Mus., VIII. 1872, p. 260; 

 and Miss. Sci. Mex. Crust., I. p. 147 (foot-notes). 



Lambrus whitei, Miers, 'Challenger' Brachyura, p. 98. 



In the form of the carapace, the hairiness of the edges of the legs 

 and carapace, and in the presence of the pterygostomian canal, this 

 species almost exactly resembles the two preceding species. 



The antero-lateral borders are sharply crenulate and end at a large 

 outwardly and baekwardly directed spine, internal to which is another 

 largish spine ; while on the posterior border are four largish spines. 

 The carapace is granular, and in the middle line are two conical spines, 

 one on the gastric the other on the cardiac region, while on either 

 branchial region are two similar spines. 



The spinature of the chelipeds is, in disposition, similar to that 



