Bd. V: 6) 
THE FISHES OF THE SWEDISH SOUTH POLAR EXPEDITION. 
67 
fin. A. viartensii Klunzinger and A. splendidus BRAUER have a similar number 
of dorsal rays but have all of them a ventral adipose fin and the origin of the 
dorsal is situated behind the origin of the ventrals. 
9. Bathylagus euryops GOODE & Bean var. latifrons n. 
I specimen from a depth of 2,700 m. 27th June 1902. 49° 56' S. lat. — 49 0 56' 
W. long. 
D. 9. A. 16. Sq. about 40. 
As may be seen from the measurements recorded below, this fish agrees very 
well with the species, which has been named as above, except in one respect viz. 
the interorbital breadth which appears to be so much larger in the southern form, 
that it may deserve to be distinguished by a third name latifrons as a geographic 
variety. The american ichthyologists who in their work “ Oceanic Ichthyology ” de- 
scribed B. euryops said that the width of the interorbital space was “a little more 
than one half the diameter of the eye”. In the present fish, however, the inter- 
orbital width measured above the middle of the eye is almost as large as the dia- 
meter of the eye and even in front, above the snout, where the interorbital width 
is narrowest, it is considerably more than “one half the diameter of eye”. 
Total length without caudal 209 mm. 
Length of head 51 » 
Depth of body 44 » 
Least depth of caudal peduncle 15 
Distance from snout to dorsal fin 97 » 
» » dorsal fin to root of caudal 114 » 
» » vent » » » » 55 » 
Diameter of eye 23 » 
Length of snout 12 » 
Interorbital width above ths middle of the eye 21 » 
» > in front on the snout 15 » 
The single specimen has lost its scales, but they seem to have been about 40 
in a longitudinal series. It is black and the iris is said to have been yellow with 
metallic lustre which, no doubt, gave the fish a strange appearance. 
The typical B. euryops has been caught in the Atlantic off the North American 
coast at different places about 39” 29' N. lat. — 40° 9' N. lat. and 7i°40' — 67° 9' 
W. long. There is thus a difference in latitude of more than 88° between the 
northern and southern locality and this may be sufficient to explain a racial dif- 
ference. 
