444 Rev. T. R. R. Stebblng on some new 



lower antennte. The segments of tlie pereion are not so short 

 compared with tlioseof tlie plcon asm A mp/u'Iochus mamidens. 

 The coxte increase in depth and breadth from tlie first to the 

 fourth, which is very large ; the lower edges of these arc finely 

 seiTated. The first and second gnathopods are simihir in form, 

 the second being twice as large as the first. The thighs are 

 elongate. The hands are more or less trianguU\r, with tlie 

 palms rounded and finely denticulate ; the front margin of the 

 hand is produced beyond the hinge-joint of the finger into a 

 sharp tooth. In the second gnathopods the long sharp finger 

 curves right round the palm and meets the wrist, which is pro- 

 duced all along the hinder margin of the hand, and terminates 

 in three or more cilia. In the first gnathopods the finger is 

 scarcely so long as the palm, and the process of the wrist 

 is shorter than the margin of the hand. In the second gnatho- 

 pods the distal extremity of the knee is obtusely pointed, and 

 terminates in a short seta ; while the distal extremity of the 

 metacarpus is truncate, with a small cavity occupying the 

 hinder half of the truncated line, and containing in the centre 

 of this cavity a short stiff seta. This minute feature may 

 perhaps be present also in the first pair of gnathopods ; but 

 the point could not be determined in the specimen examined. 

 The five pairs of pereiopoda are subef[ual, long and slender^ 

 the first two having the thighs elongate and the metacarpus a 

 little produced anteriorly, the last three having the thighs 

 larger than the coxa?, broad, and with serrated edges, and the 

 metacarpus posteriorly produced. 



The telson and the last pair of pleopoda were wanting in 

 the specimen here described ; but the excavations in the pleon- 

 segment from which they had been detached seemed to suggest 

 that the caudal plate would have been lanceolate, as in Amphi- 

 lochus manudens, and that the last pleopoda would have been 

 of considerable size, though in this respect they would differ 

 from those of the species just named. The two other pairs of 

 pleopoda are biramous, the antepenultimate pair having the 

 peduncle much longer than that of the penultimate, and the 

 branches extending further. 



The specimen described is a female ; its length one eighth 

 of an inch. 



Danaia dubia, Spence Bate. PI. XIX. figs. 2, 2 a-2 c. 



Dana'ia dubia received its specific name from Mr. Spence 

 Bate, its discoverer, in allusion to doubts which he felt on certain 

 points of its structure, his one specimen having disappeared 

 before the examination of it was completed. Specimens since 



