1 74 SHUFELDT. 



EXPLANATION OF PLATE XIX. 



Fig. 21. ^iVyHiXoi Nyctala tengmalmi ; anterior aspect, with mandible attached ; 

 natural size. 



Fig. 22. Skull of Nyctala tengmalmi ; posterior aspect, with mandible attached ; 

 natural size. 



Fig. 23. Skull of Nyctala iengmalmi ; right lateral aspect, with mandible 

 attached; natural size. 



Fig. 24. Skull of Nyctala tengmalmi ; left lateral aspect, with mandible 

 attached ; natural size. 



Fig. 25. Head of Nyctala tengmalmi ; right lateral aspect, with feathers 

 removed and showing ear-opening; natural size. 



Fig. 26. Head of A^yctala tengmalmi ; left lateral aspect, with feathers 

 removed and shovsdng ear-opening ; natural size. 



Fig. 27. Skull of Syrnium lapponicum ; left lateral view, with mandible 

 attached ; natural size. 



