158 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 

 FIG. 97. 



NV^ -WJBS 





Prion mtlatus. Profile of head. From material in 

 the British Museum. Natural size. 



FIG. 98. 



FIG. 99. 



Prion vittatus. Head from above. 

 From material in the British Museum. 

 Natural size. 



Prion mttatus. Beak from be- 

 neath. From material in the 

 British Museum. Natural size. 



Neck : Above clear plumbeous blue shading into paler greyish blue on 

 the sides. Beneath including throat and chin pure white. 



Back: Clear plumbeous blue, somewhat paler in shade than on the 

 crown and crossed by a dusky or black band. 



