AVES PUFFINIDyE. 



129 



Scl. & Salv. Nomencl. Av. Neotr. p. 149 (1873); Baird, Brewer & 

 Ridgw. Water Birds N. Amer. II. p. 380 (1884); A. O. U. Check- 

 List N. Am. Birds, p. 100 (1886); 2 ed. p. 31 (1895). 

 Puffinus gravis, Salvin, Cat. Bds. Brit. Mus. XXV, p. 373 (1896: Falk- 

 land Is.); Sharpe, Hand-List Bds. I. p. 123 (1899); Martens, Hamb. 

 Magalh. Sammelr. Vog. p. 18 (1900: Falkland Is.) ; A. O. U. Check- 

 List 2 ed. (1895) 8th Supplement from Auk, XIV. p. 124 (1897). 



GENERAL DESCRIPTION. 



Size. Adult male. Total length, about 19 inches. 



Wing, 12.7 inches. 



Tail, central rectrices, 4.65 inches; lateral rectrices, 3.75 inches. 



Tarsus, 2.3 inches. 



Color. Adult male. (P. U. O. C. no. 8576. Twenty miles at sea, off 



FIG. 75. 



FIG. 76. 



Puffinus gravis. Profile of head. From 

 material in the British Museum. J^ natural 

 size. 



Puffinus gravis. Head from above. From 

 material in the British Museum. y 2 natural 

 size. 



Cape Cod, Massachusetts, 16 August, 1881. William E. D. Scott). Gen- 

 eral color above smoky greyish brown, below white with smoky greyish 

 on middle of abdomen, and on the flanks and lower tail coverts. 



Head : Crown and sides deep smoky brown. Region in front of eye 

 more or less mottled smoky brown and whitish. 



