6 . AD. S. JENSEN. [SEC. ARCT. EXP. FRAM 
Subsequently Dresex returned to this matter’. After having exa- 
mined five sea-scorpions from Godhavn in Greenland, and compared 
them with Cottus scorpius, he finds that the “subspecies” grcenlan- 
dicus differs from the former, besides in its superior size, in the greater 
interobital width, and in the greater height of the spine-rayed dorsal fin. 
We will now look more closely at these statements. 
According to Dresel, the interorbital width in the subspecies groen- 
landicus, is contained 1, 14/5, or 11/. times in the longitudinal diameter 
of the eye, whereas the width in Cottus scorpius seldom exceeds °/s of 
the longitudinal diameter of the eye. I have investigated this circumstance 
and found the following proportions: 
Cottus scorpius from Greenland. 
Proportion of interorbital 
Total Jength Sex width to longitudinal 
diameter of the eye 
956 mm. o 1:1 
2 , Q 1:4 
40 , 9 4:5 
232, 3 3:4 
230, 9 ea 
15 , J 1-1 
193, Q 3:4 
180 - ist 4:5 
Cottus scorpius from Europe. 
Proportion of interorbital 
Total length Loeality Sex width to longitudinal 
diameter of the eye 
930 mm. The Sound Q 4: 5 
930, Upper Baltic 9 5: 6 
996, Faroe Isles Q | 
213 —C«,, The Sound fos 72412 
212 ~~, North Sea Q 9:10 
190, Upper Baltic of 3: 4 
155, Faroe Isles of 2: 38 
155, North Sea of 9: 3 
It will thus be seen that on an average the Greenland sea-scor- 
pion has a comparatively little greater width of cranium between the eyes 
1H. G. Dreset: Notes on some Greenland Fishes. Proceed. U. S. Nat. Mus., 
Vol. 7, 1884, p. 250. 
