Rev. A. M. Norman's Notes on British Amphipoda. 137 



corresponds most closely in all its characters with those taken 

 in our seas, except that the palm of the first gnathopods is 

 more defined, being sliglitly hollowed, and the hand of the 

 second gnathopods is a little larger in proportion to the wrist. 

 All the microscopic characters of setas, spines, fur, &c. 

 exactly agree ; but in consequence of tiie coarser growtli of 

 the limb the characters of armature of the inside of the finger 

 of first gnathopods cannot be so exactly determined. The 

 dorsal armature in this specimen is : — first segment (by acci- 

 dent lost in dissection) ; second eleven teeth ; third eleven 

 teeth ; fourth seven, the central very large ; fifth three, cen- 

 tral large, and two articulated intervening spines. 



In specimens received from Tromso the dorsal spines are 

 larger in size proportionately than in examples which I have 

 had the opportunity of examining from other localities. The 

 larger the number of spines on a segment the smaller the size 

 tliose spines attain. 



Hah. Three specimens taken from fishing-boats, Culler- 

 coats, Northumberland [A, M. N.) : Mus. Norm. 



Distrihution. Greenland, in lat. 66° 59' N., long. 55° 27' 

 W., 57 fath., ' Valorous ' Exped. 1876 ; off" Halifax, Nova 

 Scotia {S. I. Smith) ; Tromso {S. Schneider) ; Sweden 

 [Loven) : Mus. Norm. Iceland [Torell) ; Spitzbergen 

 {Goes)] Grand Manan (Stivipson) ; Labrador {Packard)' 

 West Norway, at Haugesund {Boeck) ; Deinnark {Meinert), 



Genus IX. Gammaeus, Fabricius, 1776. 



1. Gammarus locusta (Linn.). (PI. XII. fig. 11.) 



1767. Cancer locusta, Liune, Syst. Nat. edit. xii. p. 1055. 



1780. Oniscus jmk.r, Fabricius, Fauna Gioenlandica, p. 254. 



1820. Gammarus arcticiis, Scoresby, Account of the Arctic Regions, 



vol. i. p. 451, pi. xvi. tig. 4. 

 1824. Gammarus boreas, Sabine, Suppl. Appendix Parry's Voyage, 



p. 229. — 1862. Bate, Cat. Ampbip. Brit. Mus. p. 213, pi. xxxvii. 



tig. 10. 

 1830. Gammarus ornat^ts, H. Milne-Edwards, Ann. des Sci. Nat. xx. 



p. 372, pi. X. tigs. 0, 10.— 1840. Hist. Nat. des Crust, vol. iii. p. 47. 



—1862. Bate, Cat. Aniphip. Brit. Mus. p. 212, pi. xxxvii. tig. 8.— 



1873. S. I. Smith, Report United-States Comm. Fish & Fisheries, 



p. 557, pi. iv. tig. 15. 

 1851. Gaiitnuirus sitchensis, Brandt, MiddendorfF's Sibir. Reise, Bd. ii. 



p. 137, pi. vi. tigs. 28 a-c. — 1862. Bate, Cat. Amphip. Brit. Mus. 



p. 210, pi. xxxvii. fig. 4. 



1853. Gamviarus pidex, Stimpson, Invert. Grand 31anan, p. 55. 



1854. Gammarus mutatus, Lilljeborg, Kougl. Vet.-Akad. Plandl. p. 447. 

 1862. Gammarus locusta, Bate & Westw. Brit. Sessile-eyed Crust. 



vol. i. p. 378 (et auct.). 



