16 ARKIV FÖR ZOOLOGI. BAND 1'^. NiO 7. 



shape etc. of this band is very similar to the corresponding 

 one just described in the adult hybrid from the Copenhagen 

 Zool. Garden. 



The second primary of the Upernivik Guli is also similar 

 to the one of the hybrid mentioned. It has thus a white 

 tip between 4 and 5 cm in length with a black, subapical 

 spöt on the inner, and an almost rudimentary marking of the 

 same kind on the outer web. The pattern of the oiiter web 

 with a black band inside the white tip and the proximal 

 grey extending with a wedge between the black and the 

 shaft is entirely as described above. The black spöt along 

 the shaft on the inner web inside the white tip is in this 

 specimen considerably longer than in the foregoing specimen, 

 as it measures between 8 and 9 cm, but otherwise it has 

 the same situation. 



The third primary has also the same pattern as in the 

 foregoing specimen. The white tip is a little shorter about 

 12 mm (worn!). The subapical black spöt över the inner 

 web measures along the rhachis about 2 cm, but it is a little 

 longer along the edge. It is foUowed by a whitish spöt of 

 approximately similar size, but not sharply defined from the 

 grey of the remaining web. The black band on the outer 

 web inside the white tip measures only about 8 cm along 

 the shaft to the tip of the grey wedge, but it can be traced 

 about 12 Va cm along the edge. 



The fourth primary shows less black than in the Copen- 

 hagen hybrid. Inside the about 18 mm long white tip there 

 is a black, but not quite compact band across the inner web 

 and opposite, on the outer web is a black spöt, which, how- 

 ever, chiefly extends along the edge for about 1 V^ cm. In- 

 side these black markings is an about 2 cm broad, whitish 

 spöt followed by grey on both webs. 



The foUowing primaries are as the secondaries grey with 

 broad, white tips. 



From these notes it may be seen that this Upernivik 

 Gull so completely agrees with the Lariis marinus X L. glaucus 

 hybrid from the Zool. Garden of Copenhagen with regard to 

 the colour and pattern of the primaries that this comparison 

 perfectly confirms WmGE's genial suspicion of the former 

 being itself a hybrid between the two species of Gulls men 

 tioned. 



