AD. S. JENSEN. 



[SEC. ARGT. EXP. FRAM 



Subsequently DRESEL returned to this matter 1 . After having exa- 

 mined five sea-scorpions from Godhavn in Greenland, and compared 

 them with Coitus 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 green- 

 landicus, is contained 1, 1V 6 , or l*/2 times in the longitudinal diameter 

 of the eye, whereas the width in Cottus scorpius seldom exceeds 5 /s of 

 the longitudinal diameter of the eye. I have investigated this circumstance 

 and found the following proportions: 



Cottus scorpius from Greenland. 



Total length Sex 



256 mm. 



252 

 240 



Proportion of interorbital 



width to longitudinal 



diameter of the eye 



1 : 1 



230 

 215 

 193 



180 



cf 



9 



9 



cT 



9 



cf 



9 



cf 



Cottus scorpius from Europe. 



Proportion of interorbital 

 width to longitudinal 

 diameter of the eye 



Sex 



9 

 9 

 9 

 cT 

 9 

 cT 

 cf 

 cf 



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 



1 H. G. DRESEL: Notes on some Greenland Fishes. Proceed. U. S. Nat. Mus., 

 Vol. 7, 1884, p. 250. 



