Rev. A. M. Norman's Notes on British Amphipoda. 115 



distallj, palm ratlier waved, wholly devoid of teeth or tu- 

 bercles. Telson (fig. 4) forming three fom-ths of an ellipse, 

 sides gradually sloping to the well-rounded extremity. Length 

 7 millim. 



Leucothoe impiaricornis differs from the described British 

 species in the very small size of the antennte, in the narrow 

 hand and short nail of the first gnathopods. The form of 

 the hand approaches that of L. furina, but the palm has no 

 teeth ; the telson also distinguishes it from the species just 

 named. 



Hah. St. Magnus Bay and Balta Sound, Shetland {A.M. N.). 



Genus II. EusiRUS, Kroyer, 1845. 



Eusirus longijyesj A. Boeck. 



1860. Eusirus lonr/ipes, Boeck, Forh. ved de Skaud. Xatuvf. p. 656. 

 1862. Eusirus helvdia-, Bate, Cat. AmphijD. Crust. Brit. Mu8. p. 155, 



pi. xxix. fig-. 2. 

 1862. Eusirus helvetics, Bate & Westw. Brit. Sessile-eyed Crust, vnl. i. 



p. 207. 

 1866. Eusirus bidetis, Heller, Amphip. des Adriat. Meeres, p. 32, pi. iii. 



tig. 19. 

 1868. Eusirus helvetics, Norman, I/ast Report Dredging Shetland Isles, 



Brit. Assoc. Rep. p. 281. 

 1872. Eu'irus lonyipes, A. Boeck, De Skand. og Arkt. Amphip. p. 504, 



pi. xix. fig. 4. 



First two segments of pleon with a central dorsal tooth ; 

 hinder margin of third segment denticulately serrated through- 

 out its entire length, serrations of lower portion pointing 

 upwards, but those near the summit pointing downwards *. 

 Length of thigh of last three perfeopods measuring scarcely 

 more than one fifth the length of the attenuated limbs. 

 Telson cleft to not more than one third of its length. Thighs 

 of last three perseopods strongly serrated posteriorly. Length 

 14 millim. 



Hob. Shetland ; Skye ; Firth of Clyde ; off Berwick 

 [A. M. N.) ; Aberdeensiiire [Daioson) : Mus. Norm. 



Distribution. West Norway {G. 0. Sars) : Mus. Norm. 

 South Norway (6r. 0. Sars) ; Bay of Biscay [Prince de 

 Monaco) ; Adriatic [Heller). 



* In Eusirus cuspidatus, Krojer (from Greenland, * Valorous ' Exped. 

 1876, and off Halifax, Nova Scotia {S.I. Smith): Mus. Norm.), the 

 hinder margin of third segment is also denticulately serrated ; but in that 

 species the deuticulatione throughout the entire length point upwards. 



