MONOGEAPH OF THE PETRELS. 



f. Bill and feet smaller ; culmen, 

 1.15-1.25 inches. 



i 6 Tarsi and feet black . . trinitatis, p. 232 



f Tarsi and feet yellowish, 



toes black . . . . aterrima, p. 179 



XV. — Pagodroma, Bp. 



Type 



Pagodroma, Bp., Consp. Av., II., p. 192 (1855) ; Coues, Pr. 

 Acad. Nat. Sci. Philad., 1866, p. 159 ; Salvin, Cat. 

 Birds Brit. Mus. XXV., p. 419 (1896) . . ..P. nivea 



A single Antarctic species, P. nivea (p. 254). 



XVI. — Bulweria, Bp. 



Type 



Bulweria, Bp., Cat. Met. Ucc. Europ., p. 81 (1842) ; id., 



Consp. Av., II., p. 194 (1856); Forbes, Voy. 



" Challenger," Zool., IV., pt. XI., p. 38 (1882) ; 



Salvin, Cat. Birds Brit. Mus., XXV, p. 420 (1896) B. bulweri 

 Mstrelata, pt., Coues, Pr. Acad. Nat. Sci. Philad., 1866, p. 158. 



Key to the Species. 



a. Bill more slender ; greater wing-coverts lighter and 

 greyer than the other coverts and the back ; chin 

 greyer than the rest of the under-surface ; middle 

 toe and claw, 1.3 inch . . . . . . . . bulweri, p. 257 



6. Bill stouter ; greater wing-coverts sooty-brown like 

 the others ; chin like the rest of the under- 

 surface; middle toe and claw, 1.6 inch .. .. macgillivrayi, p. 260 



SUB-FAMILY II.— FULMARESLE. 

 (Salvin, Cat. Birds Brit. Mus., XXV., p. 422.) 



Key to the Genera. 



a. Size very large ; total length, about 35 inches ; nasal 



tube very long and stout ; inter-ramal space 



feathered throughout ; tail-feathers 16 in number Macronectes, p. 261 



b. Size smaller ; total length, about 18.5 inches ; inter 



ramal space bare ; tail-feathers 14 in number. 



XL VIII 



