128 Rev. A. M. Norman's Notes on British ximphipoda. 



below, the first pointed in front. Pleon with dorsal margins 

 smooth, not spined ; second and third segments with infero- 

 posteal angles produced into a spine-like point. Antennules 

 with first two joints of peduncle remarkably long, the second 

 slightly longer than the first, third not one third the length 

 of the second; flagellum of 17-24 articulations, secondary 

 appendage five-jointed, subequal in length to four joints of 

 flagellum. Antennce about equal in length to the peduncle of 

 the antennules ; fourth joint longer than fifth ; flagellum short, 

 subequal in length to last joint of peduncle. First gnatho- 

 pods Avith subtriangular wrist ; hand subovate, wider at the 

 extremity than at the base, subequal in length to the wrist, 

 palm convex, scarcely defined ; finger strong, slightly curved, 

 simple, with setre on the outer and cilia on the inner margin. 

 Second gnntJiojJods having the meros produced below into a 

 spine-point ; wrist subtriangular, widening much distally ; 

 hand of moderate size, subquadrate, length to breadth as 5 to 

 3, widening slightly to the ])alra ; palm only very little 

 oblique, defined by a long spine, crenuhited or toothed, and 

 edged with a few spinulcs. Perceopods all slender, with very 

 long linear tliighs, which in all the limbs are the longest 

 joints ; thighs of last three pairs gradually increasing in 

 breadth, but that of last pair about four times as long as 

 broad, its margins with distant serrulations ; nails of mode- 

 rate length and acute. Last urojwds with very long lanceo- 

 late branches, about three times the length of the peduncle. 

 Telson cleft to two thirds its length, clett widely open, each 

 apex ending in two spine-points and a ciiium. Length 18- 

 22 millim. 



Hah. Sound of Skye, 1866 {A. M. N.) • Locli Fyne, 

 dredged by the ' Medusa,' the vessel of the Scotch Marine 

 Station, 1888 [D. Robertson) : Mus. Norm. Taken by 

 * Medusa' oft' the lighthouse, Little Cumbrae, Firth of Clyde, 

 in 55-60 fath., and oft' the Isle of Arran, N.B., in 80 fath., 

 on soft mud [D. Robertson !) ; one specimen among material 

 dredged a little west of Inchkeith, Liith of Forth, 1887 {2\ 

 Scott I). 



Distribution. Greenland [Hansen^ ; Advent Bay, Spitz- 

 bergen, 20 fath. [Smittj fide Goes) ; Bohusliln, Sweden 

 {Loven, fide Goes) ; Denmark {Meinert) ; West Norway 

 {Danielssen). 



Genus VI. Gammarella, Bate, 1857. 

 Gammarella brevicaudata (H. Milne-Edwards). 

 1830. Gammarua brevicaudatus, H. Milne-Edwards, Ann. des Sc. Nat. 

 vol. XX. p. 369, J ? . 



