354 KEY. T. K. R. STEBBING ON jSEW SPECIES OE AMPHIPODOUS 



leaving plenty of space for the glandular secretion, which probably finds an exit just 

 above the finger-tip. 



Third perceojKhh. The side-plates are produced in a spine-like manner both forward 

 and backward, the hinder processes being very prominent features in the appearance of 

 the animal, extending back considerably beyond the sixth segment. The second joint 

 has five spines on the hind margin, and three spines on the front margin, the apical 

 tooth of which reaches almost as far as the small apical tooth of the short third joint. 

 The fourth joint carries eleven or twelve spines on each margin, and is considerably 

 longer than the long second joint. The remainder of the limb was missing. 



Tlie fourth and fiftii perseopods are alike. The side-plates of the fourth are the 

 larger, with a backward-directed point, whicli is evanescent in the next segment. The 

 joints are nearly as in the second peraeopods, but the sixth joint is longer and without 

 the apical teeth, and the linger is more produced. 



The pleopods carry two very small coupling spines, and have five or six joints to the 

 inner branch, and six or seven to the outer branch, the large first joint of the inner 

 branch carrying a long cleft spine. 



The uropods are narrow and elongate, the first a little longer than the second, and 

 the second than the third ; the first has a minute serration of the outer margin, and 

 numerous small spines on the lower half of the peduncle; its coalesced inner branch is 

 about two seventlis of its length; the outer branch is imperfect, less than half the 

 length of the inner ; the second pair have a few spines on the outer and several on 

 the inner margin, tlie coalesced branch a little damaged, but probably like that in the 

 preceding pair, the free outer branch longer than in the preceding pair and probably 

 more than half as long as the inner ; the third pair have three spines on the outer 

 margin, the free outer branch shorter than the inner, but both damaged at the apex. 



From the front of the head to the extremity of the urfipods the specimen scarcely 

 measured one-tenth of an inch. It could not be persuaded to lie flat, though it would 

 readily stand on its head. Neither body nor appendages showed any inclination to 

 break, notwithstanding pressure repeatedly applied, so that the texture must be 

 tolerably tough. That the third perseopods were already broken was no doubt due 

 to their exceptional length. 



Habitat. Atlantic. Lat. 7° 54' N., long. 17° 25' W. Taken with the tow-net from 

 a depth of five fathoms, between 7.20 and 8.20 p.m. 



The specific name, from the Greek aKaf^iiSijc, refers to the spiny armature of the 

 body, a feature so uncommon among the Hyperidea. 



SciNA STENorus, n. sp. (Plate Lll. A.) 



The head is slightly emarginate between the antenna;. The first four segments of 

 the perseon were to a certain extent twisted and telescoped, so that their relative 

 lengths could not be accurately ascertained. The last three segments of the peraeon 



