of the Families Lophogastride and Kuphausiide. 461 
peduncle, the distal portion of the leaflet being cut into 
digitated processes *. 
Nyctiphanes Couchii is very like N. australis, G. O. Sars 
(‘ Challenger’ Report, p. 115, pls. xx. and xxi. figs. 1-7), 
except that in the former there isa spine at the base of the 
telson and a small preanal spine, which are absent in the 
latter. The male also of N. Couwchit agrees most closely with 
N. australis in the form of the hinder margin of the carapace 
and the sexual developments of the pleopods (vide ‘ Chal- 
lenger’ Report, pl. xxi. figs. 3, 4, 6, 7). As regards the 
first pleopod, the likeness is not merely one of general 
character, but the serrated edge of the one margin and the 
single seta cf the lateral lobe of the other margin are identical. 
But with respect to the male antennules, no leaflet corre- 
sponding to that of the second joint in N. Couchit is described 
or figured in N. australis. 
Genus 2. BorropHaustia, G. O. Sars, 1883. 
(Vide Sars, Prelim. Notices Schizopoda ‘Challenger ’’ 
Exped., Christ. Vidensk. Forhand. 1883, p. 11 (separate 
copy); but I am not aware that the genus has as yet been 
defined.) 
1. Boreophausia inermis (Kroyer). 
1849. Thysanopoda inermis, Kroyer, Voyage en Scandinavie &c., Crust. 
pl. vii. fig. 2 a-t. 
1856. Thysanopoda inermis, Kroyer, “ Monog, Slegten Sergestes,” Vi- 
densk. Selsk. Sky. 5 Reekke, vol. iv. p. 294, pl. v. fig. 24. 
1879. Thysanopoda inermis, S. I. Smith, “ Stalk-eyed Crust. Atlantic 
Coasts N. Amer.,” Trans. Conn. Acad. vol. v. p. 91. 
1882, Luphausia inermis, G. O, Sars, Oversigt &e. (2. ¢.), p. 51, pl. i. 
fie, 15. 
1887. Boreophausia inermis, H. J. Hansen, /. ¢. p. 53. 
Banff (7. Edward) ; Shetland, 1868 (4. J. N.) ; Moray 
Firth (7. Scott): Mus. Nor. Clyde district (Brook and 
Hoyle). 
Distribution. West Norway (G. O. Sars); Eastport, 
N.E. America (S. 2. Smith): Mus. Nor. Greenland (Méller 
dc., fide H. J. Hansen) ; HK. America from south of Cape Cod 
northwards (S. 7. Smith); Gulf of St. Lawrence, as 7. 
neglecta (J. 7. Whiteaves) ; Spitsbergen (Goés). 
* This leaflet is similar in general character to that attached to the 
Jirst joint of the antennular peduncle in the genus Huphausia. 
