245 



with radiating ridges», and consequently tlie American form 

 wtiich had hitherto been identified with A. uncinatus should be 

 «apparently distinct». If however J. & E. had extended their 

 examination to a few more specimens they would have discovered 

 that the specimens vary greatly with respect to the appearance 

 of the occipital spines, a fact of which I have been made certain 

 from the European-Greenland material at my disposal. The occip- 

 ital protuberances are sometimes comparatively high with rather 

 upright or backwards bent points, sometimes they are lower 

 and more stubby , sometimes quite disappearing so that no 

 separation of species can reasonably be based on this «character». 

 I have not seen any specimen provided with radiating ridges 

 on the occipital protuberance, nor does Collett mention such 

 a sculpture, but mentions them in just the same expressions 

 as J. &E. viz: «two blunt obtuse protuberances on the occiput». 

 1 suppose the artist has represented in a somewhat exagge- 

 rated way the indistinct folds which are sometimes seen in the 

 skin covering the spine, so that it looks as if the spine itself 

 were provided with keels. Finally I shall here state that in 

 two American specimens which our museum has obtained from 

 the «Smithsonian Institution» the occipital protuberances are 

 not less projecting than in many European-Greenland specimens. 



Icelus bicornis Reinhardt. 



Cottus bicornis Reinhardt, Overs. Kgl. D. Vidensk. Selsk. Forh. 1839, p. 9. 



Icelus hamatus Kröyer, Naturh. Tidsskr. II, 1, 1845, p. 253; Lütken, 

 Vidensk. Meddel. Naturh. Foren. Kbhvn. 1876, p. 380; Collett, The Norwegian 

 North-Atlantic Expedition, Fishes, 1880, p. 34, PL I, Fig. 8; Smitt, Skandi- 

 naviens Fiskar, I, 1892, p. 167, Fig. 51. 



Tasiusak. 30— 50 fms. 22.8.1902. Ispecim. 

 Angmagsalik. 10— fms. 14—16. 9. 1900. Eel-seine. 

 25 specim. 



Hekla Havn. 6—10 fms. 1891—92. Dredge. 3 specim. 



