6 



AD. S. JENSEN. 



[SEC. ARCT. 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" groenlan- 

 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, ; , or l 1 ^ 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 



Proportion of interorbital 



width to longitudinal 



diameter of the eye 



1 : 1 



Cottus scorpius from Europe. 



Total length Locality 



Sex 



Proportion of interorbital 

 width to longitudinal 

 diameter of the eye 



' 5 



6 

 7 



12 



10 



4 



3 



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 



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

 Vol. 7, 1884. p. 250. 



