Indian Deep-sea Dredging. 273 



the grooved dovvnstroke, as in M. phiUppinensis. It is easy 

 to be seen that the condition of parts manifested by the pre- 

 ceding species has been brought about by the expansion, leaf- 

 like, of the T-shaped ridge in all its parts, whereby the 

 anterior ends of the lateral margins have been thrust inwards 

 and backwards against the expanded anterior margin, so that 

 the latter appears to be " held in position by clamp-like 

 lateral processes." The legs of the first pair have a spine on 

 the second and third joints below. There is a very minute 

 pair of sternal spines between the second pair of legs in the 

 female ; they are, however, much smaller than in the preceding 

 species, and it is hence possible that they may be really 

 absent or so small as to be readily overlooked in the specimens 

 described by Spence Bate, who expressly states that none 

 are present. 



The branchial formula is : — 



The branchiae are voluminous and remarkably laxly con- 

 structed and feathery, with an unusually well-developed 

 terminal plume. The anterior arthrobranchia of the penul- 

 timate somite is represented by a simple filament. The last 

 epipodite (xii.) is branched. 



Length, from tip of rostrum to tip of telson, ^ 77 millim., 

 $ 88 millim. ; of carapace, from supra-orbital margin to 

 middle of posterior margin in a straight line, <^ 18 millim., 

 ? 20'5 millim. ; of abdomen, ^ 45 millim., $ 49 millim. ; 

 of inner flagellum of antennules, ^ 16"5 millim., $ 17'5 

 millim. ; of outer flagellum of antennules, ^ 8 millim., 

 X? 7-5 millim. 



Kine males and eleven females from Station 119, 95 

 fathoms. It had previously been obtained in considerable 

 numbers off the Mahanaddi Delta in 68 fathoms (32 (^ and 

 26 ? ), and at Station 96, 98 to 102 fathoms (4 S and 10 $ ), 

 the colour of which last was noted as transparent grey irregu- 

 larly suff'used with pink. 



