Indian Deep-sea Dredging. 285 



The dorsal ridge of the abdomen commences on the second 

 tergum. The second (Atlantic) or third (Indian) to fifth 

 pleura are minutely mucronate ; in one of our specimens a 

 very minute mucro can be made out on one of the pleura of 

 the second tergum. 



Fig. 9. 



Aristceopsis Edwardsiana, $ , X |. 



18. ArisUeopsis armata (Sp. Bate). 



Aristeus annatus, Sp. Bate, Ann. & Mag. Nat. Hist. (5) viii. 1881, 

 p. 188 ; id. ' Challenger ' Macrura, 1888, p. 312, pis. xlv., xlvi., d" 2 • 



Aristeus ? tridens, S. I. Smith, Ann. Rep. U, S. Comm. Fish. 1884, 

 p. 404, J 5 , ((iO), pi. X. fig. 1, c?. 



A magnificent example of an apparently adult male from 

 Station 117, 1748 fathoms. 



Colour in life deep crimson. 



It measures no less than 270 millim. in length from the 

 tip of the rostrum to the tip of the telson. 



It exhibits a thickening of the tissues of the apex of the 

 antennal scale, but shows no sign of reduction in the length 

 of the rostrum met with in other species. 



The dorsal ridge of the abdomen commences in the third 

 tergum. The abdominal pleura from the third or fourth to 

 the fifth are minutely mucronate. 



Mandibles as in S. I. Smith's figures. 



The inner branches of the caudal swimrneret when laid 

 back reach to the end of the telson. 



