272 



Car etiological Fauna of India. 



fifth longer than the carapace : except for a line of spinules along the 

 posterior (lower) border of the meropodite they are smooth. 



Greatest length of carapace (male) ... ... 16 millim. 



,, breadth ,, ... ... 18 ,, 



Length of cheliped ... ... ... 72 „ 



Off Ceylon in deep-water. 



Colours in spirit : chelipeds and legs purplish white, carapace dull 

 slaty purple. 



Sub-genus Aulacolambrus, A. M.-Edw. 



Aulacolambrus, A. Milne-Edwards, Miss. Sci. Mex. Crust., I. p. 147. 

 Aulacolambrus, Miers, ' Challenger ' Brachyura, p. 97. 



Pterygostomian region traversed, from the orbit to the afferent 

 branchial orifice, by a deep channel, which is closed and converted into 

 a tube by thick fringes of hairs : the lateral epibranchial spine is of 

 huge size : the edges of the carapace chelipeds and legs are more or 

 less conspicuously hairy. 



Key to the Indian species of the sub-genus Aulacolambrus. 



I. Carapace as long as broad, with a projecting rostrum and a 

 distinct post-ocular constriction; its surface closely 

 covered with rasp-like tubercles : carapace and legs not 

 conspicuously hairy..... L. sculptus. 





fl- 



II. Carapace broad- 

 er than long, its 

 surface irregular- 

 ly tuberculate; 

 rostrum not or 

 hardly pro j ecting : 

 no post-ocular<{ 

 constriction: mar- 

 gins of carapace, 

 chelipeds and legs 

 fringed with re- 

 markably long 

 tangled hairs. 



Antero -lateral border with large spines 

 in front of the large lateral epibranchial 

 spines : spines of inner edge of hand 

 strongly curved upwards and outwards.. 



L. curvispinis. 



Antero-lateral 

 border with small 

 teeth in front of 

 the large lateral 

 epibranchial 

 spines : spines of 

 inner edge of 

 hand not curved. 



'"a. No spines in mid- 

 dle line of cara- 

 pace, or on bran- 

 chial regions L. hoplonotus. 



I 



6. Some spines i n 

 middle line of ca- 

 r a p a c e, and on 

 branchial regions : 

 spines on outer 

 edge of hand very 

 ^ long L. whitei. 



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



Lambrus sculptus, A. Milne-Edwards, Nouv. Archiv. du Mus., VIII. 1872, 

 p. 258, pi. xiv. fig. 3. 



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



Lambrus sculptus, J. R. Henderson, Trans. Linn. Soc, Zool. (2) V. 1893, p. 350. 



The carapace is triangular, broad behind, and as long as broad. 

 The rostrum is triangular, dorsally grooved and declivous, and tapers 



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