390 Annals of the Carnegie Museum. 



Plate XVII. 



Fig. 7. Right lateral view of the skull, including mandible, of a specimen of 

 Puffinus major; adult; nat. size. Mandible detached. (No. 17799, Coll. U. 

 S, Nat. Mus. " La Havre Banks, U. S. F. Comm. Schr, ' Grampus.' ") 



Fig. 8 Right lateral view of the skull, including mandible, of a specimen 

 of Puffinus borealis; adult; nat. size. (No. 17769, Coll. U. S. Nat. Mus., 

 Massachusetts, U. S. Fish Comm.) Mandible articulated and held in situ 

 by its dried ligaments. 



Fig. 9. Right lateral view of the skull and detached mandible of a speci- 

 men of Puffinus creatopus ; adult. (Coll. U. S. Nat. Mus., No. 18773.) 



Fig. 10. Right lateral view of the cranium of an adult specimen lacking 

 the mandible, of ^strelata lessoni. (Coll. U. S. Nat. Mus. No. 14494, Ker- 

 guelen Island. Dr. Jerome H. Kidder, U. S. N., collector.) Quadrates and 

 pterygoids missing ; margin of lacrymal shaved off, otherwise quite perfect. 



