Indian Deep-sea Dredging. 259 



millim. 



Length of carapace 93 



Greatest breadth of carapace 97 



Expanse of legs 700 



The largest female measures : — 



millim. 



Length of carapace 80 



Greatest breadth of carapace 82 



Expanse of legs 400 



All our specimens, including those taken on previous occa- 

 sions, greatly exceed the ' Challenger ' specimens in size. 

 The males run much larger than the females, and the great 

 chelas are greatly enlarged, with the palms inflated and armed 

 with three rows of slender hooked spines. 



Our specimens differ from the type in a number of details, 

 which do not justify the description of a new species without 

 actual comparison with the type. 



Echinoplax, Miers. 

 36. Echinoplax pungens, sp. n., Wood-Mason. 



Differs from Echinoplax Moseleyi, Miers, in its much larger 

 size ; in its much more numerous, more thickset, and longer 

 spines; in its more regularly and symmetrically pyriform 

 carapace ; in its thicker legs ; in its smaller eyes, which, when 

 laid back, do not nearly reach to the spine which limits the 

 ocular cavity posteriorly ; and by the broader abdomen of the 

 female. 



Colour in the fresh state a brilliant straw-colour. 



Five female specimens from Station 56, 240 to 220 

 fathoms, the largest of them measuring 340 millim. in expanse 

 of legs, 60 millim. in breadth of carapace across the branchial 

 regions, and 88 millim. in length of carapace from its hinder 

 margin to the tips of the rostral spines. 



Smaller specimens have a much more spiny abdomen and 

 are generally more spiny than larger ones. 



37. Encephaloides Armstrongi, gen. et sp. n., Wood-Mason. 



Remarkable for the large size of the branchial chambers, 

 which are so inflated as to meet together over the back in a 

 straight suture. Both the afferent and the efferent branchial 

 openings are also very large. 



In the female the cavity of the brood-pouch communicates 

 with the branchial chambers by two canals, formed by deep 



