86 MESSES. NOEMAN AND STEBBING ON THE 



of the upper antenna, the inner margin spined like the lobe just mentioned ; third very 

 short ; fourth and fifth subequal to each other ; antennal scale small, narrow, not quite 

 reaching the end of the fourth joint ; flagellum of 12-15 articulations. 



The first gnathopods (i. l) have the basos short and broad, with a tooth on the middle 

 of the upperside, and a curved spine below the centre of the front ; the narrow and 

 rather sinuous meros has a spine at the inferior extremity ; the wrist widens towards 

 the hand, and has its front margin angulated and armed with two teeth (which are 

 more easily seen when viewed from the inner face) ; hand (i. gn^) broad and rather 

 massive, thumb short and broad, with a large tooth-process in the middle, which fits 

 into the cavity of the overarching finger, which is also furnished with a small tooth 

 situated nearer the base than that of the thumb ; distal portion of both finger and 

 thumb slightly denticulate on the edge, the former also with a row of cilia within the 

 margin ; both finger and thumb tipped, as usual, with horny-looking nails. 



In the second gnathopods (i. d and i. l) the meros has distally a spine on each margin ; 

 the carpus a distal spine on the back, and two on the front margin ; the hand one or, 

 more rarely, two distal spines above, and four or, more rarely, five spines on the palm ; 

 all these spines are more slender than is usual in this genus in similar positions. The 

 finger has a central cilium on the back, and two or three minute teeth on the impinging 

 edge. 



The last peraeopods (i-l^i'p^) have the ultimate joints much produced and narrower 

 than usual ; hand four times as long as broad, with two simple slender spines near the 

 base, and one on each side of the finger, a curved pectination sweeps semispirally round 

 the joint from the base to the extremity, where it forms a crest round the finger ; the 

 pectination consists of a series of (60 or 70 1) closely packed lancet-shaped processes, 

 which are themselves serrulated on the upper margin ; finger remarkably long, slender, 

 and acute, nearly as long as the hand. 



Length half an inch, or 12 millim. 



The specimen described appears to be a female, as it has scale-like appendages 

 to the inner base of the second, third, and fourth legs, which we take to be the 

 commencing development of the egg-pouch. The side view of the head, however 

 (i. l), is taken from a fragment which, from the greater development of the gnathopods, 

 is probably a male. 



The specimens just referred to were taken in the ' Porcupine ' Expedition in 1869 

 S.S.W. of Ireland, in 725 fathoms (Station 36, lat. 48° 50' N., long. 11° 9' W.), and are 

 identical with a Swedish specimen, for which we are indebted to Professor Lilljeborg. 



We (A. M. N.) have since, in 1878 and 1879, dredged this species in great abun- 

 dance in some of the Norwegian fiords, more especially near Lervig, at the mouth of 

 the Hardanger Fiord, in ISO fathoms, and near Drobak in the Cliristiania Fiord. 



