850 THE VOYAGE OF H.M.S. CHALLENGER. 



species to CEdiceroides conspicua, as it stands on Pis. LX. and LXL, but I have since 

 reflected that the name rostrata has no such inherent depravity as to justify a change, 

 and I suppose that, apart from such defect, the author of a specific name has no more 

 rio-ht over it, when once published, than any one else. The name QSdiceroides conspicua, 

 being thus strangled before its birth, will, I hope, not swell the future lists of synonyms. 



CEdiceroides cinderella, n. sp. (Pis. LXIL, LXIIL). 



The Head as long as the first three segments of the perseon, the rostrum dorsally, 

 inferiorly, and laterally carinate, somewhat depressed, reaching nearly as far as the distal 

 end of the first joint of the upper antennae, its width at the centre not half its length ; 

 the lateral lobes of the head irregularly rounded, produced over the base of the lower 

 antennae ; back of perseon a little imbricated ; first three pleon-segments with the postero- 

 lateral angles rounded, lower margins fringed with setae. 



Eyes long, narrow, approximate, occupying most of the rostrum, and narrowing as 

 they approach its blunt point. 



Upper Antennae. — The first joint thicker and longer than the second, the second 

 nearly twice as long and twice as broad as the third, all carrying plumose setae, the 

 second having several groujis, the whole peduncle not reaching nearl}^ to the distal end 

 of the fourth joint of the lower antennae ; of the flagellum only eight joints remained. 



Loioer Antennae. — First joint not greatly expanded, gland-cone high up on the second, 

 not decurrent by the side of the third ; third joint scarcely longer than broad, carrying 

 groups of setae ; fourth joint long and stout, carrying some setae and feathered cilia ; the 

 fifth joint about as long but less broad, having, besides setae and cilia, four large spines, 

 two marginal and two apical ; the flagellum of fifty-four joints, of which the first is 

 longer than any that follow, the last alone is very slender, each with the exception of 

 the last four carries a small calceolus, a long seta and some short ones. 



Upper Lip. — The distal margin centrally smooth, the sides, which retire so as to 

 complete almost a semicircle, are fringed with cilia almost up to the point where they 

 bend round and narrow the lip ; the inner plate entirely within the circuit of the outer, a 

 little emarginate. 



Mandibles. — The cutting plate broad, with a small tooth at one end, three large teeth 

 at the other, and an intermediate edge which is smooth or slightly denticulate ; this plate 

 folds to some extent round the secondary plate, which in the left mandible is broad, the 

 distal margin divided into five teeth, the lowest the longest ; in the right mandible the 

 secondary plate is of slighter construction, and in one specimen exhibited two teeth denti- 

 culate along the edges, while in the other it showed a long tooth with two denticles upon 

 it and three smaller teeth, in the former case the plate being apparently seen end-on, and 

 in the latter case broadside, which suffices partially, not wholly, to account for the difl"erence; 



