1 76 SHUFELDT. 



EXPLANATION OF PLATE XX. 



Fig. 28. Head of Syrnium lapponicum ; left lateral aspect, with feathers 

 removed and showing ear-opening; natural size. 



Fig. 29. Skull of Syrnium lapponicum ; right lateral aspect, with mandible 

 attached ; natural size. 



Fig. 30. Head of Syrnium lapponicum ; right lateral aspect, with feathers 

 removed and showing ear-opening; natural size. 



