28 EEV. T. R. E. STEBBING ON AMPHIPODA FEOM 



The finger is short, curved, with a spinule from its inner margin cnrviug towards the 

 small but decided nail. The fingers are similarly shaped in all the perteopods. 



Second perc^opods. The side-plates are broader than the preceding pairs, with the hind 

 margin doubly excavate above. The limbs closely resemble the preceding pair. 



Third perceopods. The side-plates are broad, bilobed, not very deep. The second 

 joint has the breadth and depth about equal, with the margins very slightly indented. 

 The fourth joint is much broader, but not longer than the sixth, which is narrower but 

 a little longer than the fifth. The fourth joint has spines on both margins, the apical 

 groups l)eing large. The same applies to the fifth joint, except that its hind margin is 

 only armed at the apex. The sixth joint has spines along the front. 



Fourth perceopods. These are similar to the preceding, but with the joints from the 

 second to the sixth decidedly larger. 



Fifth 2JercBopods. Tlie side-plates are not bilobed. The limbs are like the jireceding 

 pair, but larger. 



Fleopods. There are two, or in some cases three, small coupling-spines. The spines of 

 the inner margin of the first joint of the inner ramus have a distal thickening, but no 

 cleft could be distinguished. The rami appear to be as nearly as possible eqvial in 

 length, with about thirteen joints apiece, each carrying the usual pair of plumose setae. 



TJropods. The first pair are the longest, with peduncle longer than the rami, having 

 spines on its iipper margin and a large spine at the apex. The rami are of equal length, 

 with one large and other small spines at the apex, the inner having two in addition on 

 the upper margin. The second pair are much shorter, but similarly armed. The third 

 pair are short, the peduncle not being so long as the telson. It carries some apical 

 spines. So does the outer ramus, Avhich is a little shorter. The inner ramus is conical, 

 almost rudimentary, tipped with a minute seta. 



Lenyth. In the partially-folded position which seems natural to animals of this genus, 

 the length of the specimens averages a quarter of an inch. 



ILah. Harbour, Antigua, West Indies (specimens received from W. E. Forrest, Esq.). 

 Specimens from the Copenhagen Museum were labelled " St. Thomas, Havnen, 1877. 

 Eggersr 



The specific name refers to the appearance presented by the extremity of the maxil- 

 lipeds, whicli in the male is very striking. 



Fam. LYSIANASSID^. 



Lysianax cinghalensis, n. sp. (Plate 7 A.) 



First three segments of plcon large, postero-lateral angles of third segment rounded. 



The etjes large and black, occupying most of the svu-face of the head, on the top of 

 which they meet. 



First antennce. First joint tumid, scarcely longer than deep, nearly twice as long as 

 the second and third combined ; flagellum six-jointed, shorter than first joint of peduncle ; 

 accessory flagellum three-jointed, less than half the length of the primary. 



