8 AD. S. JENSEN. [SEC. ARCT. EXP. FRAM 
Thus we see that in the Greenland form, the longest ray in the first 
dorsal fin goes from’ 5 to 7.6 times into the total length (to the base of 
the caudal fin), and in the European form from 6.2 to 7.3 times; conse- 
quently no variety, and still less a species, can be based upon this pro- 
portion. Nor does the height of the second dorsal fin constitute a 
character for separation, although it seems on an average to be a little 
lower in the European than in the Greenland form, the longest ray in 
the second dorsal fin in the latter being of a length that is contained 
from 4.9 to 5.8 times in the total length (to the base of the caudal fin), 
while in the European form it is from 5.1 to 6.4 times. 
Taking everything into consideration, I think the idea of separating 
the arctic sea-scorpion from that of the temperate regions as a definite 
subspecies, must be abandoned. 
Icelus bicornis Retnuarvt. 
Syn. Icelus hamatus Kroyer. 
July 22, 1900. The winter harbour, Havnefjord, about 20 fathoms. 
1 specimen, 07, 61.5 mm. 
» 26, 1900. West side of the entrance to Stordalen, Havnefjord, 
about 10 fath. 1 specimen, o%, 77 mm. 
Fin rays: D1. 9, D?. 20, A. 16, P. 18. 
» 931, 1900. Round Vestre Sund, Havnetjord, 10—30 fath. 1 speci- 
men, co, 64 mm. 
Fin rays: D1. 9, D2. 20, A. 16, P. 18. 
Aug. 3, 1900. Fosheims Peak and the valley on the west side of 
Havnefjord, from 2 to 20 fath. Small stones. 1 speci- 
men, 0, 58 mm. 
Sept. 19, 1900. Off Forvisningsdalen, Gaasefjord, 2—20 fath. Clay with 
small stones. 2 specimens: 
a. 9 91 mm. D!. 9, D®. 21, A. 16, P. 18, 
a wee ES a5 igs Me a SBRy 4 IG) 2 Te: 
» 20, 1900. The interior of Gaasefjord, 3—20 fath. 2 specimens: 
a. Y 83 mm. D1. 9, D2. 21, A. 14, P. 18, 
bg a? 4 
July 12, 1901. Bay at Landsend. 1 specimen, 44 mm. 
Aug. 16, 1901. The head of the Gaasefjord. About 7 fath. 3 specimens: 
a. 75.5 mm. D1.9, D?. 19, A. 16, P. 18. 
aes a 
c0' 48.5 , 
