PROCELLARINtE. procellaria. 
337 
bill and feet yellow ; head, neck, and lower parts pure white ; back 
and wings light greyish-blue, but most of the feathers, including those 
of the tail, becoming dark grey toward the end ; primary quills and 
their coverts blackish-brown tinged with grey. Differs from P. gla- 
cialis chiefly in the form of the bill. 
Adult, 18 wing, 12| ; tail, 4| ; bill. If. 
North west coast of America. Abundant. 
Pacific Fulmar, Procellaria pacifica, Aud. Orn. Biog. v. v. p. 331. 
463. 4. Procellaria tenuirostris, Aud. Slender-billed Ful- 
mar. 
Not figured. 
Bill about the same length as the head, rather slender, much com- 
pressed, with the nasal plate somewhat carinate and concave ; tail 
much rounded, of fourteen feathers ; bill yellow, with the nasal plate, 
half of the unguis of the upper mandible, and the tip of the lower 
black ; feet yellow, claws brownish-black ; plumage greyish-blue, 
paler on the lower parts, neck, and head ; primary quills and their 
coverts blackish-grey. Differs from the last chiefly in the form and 
colour of the bill. 
Length, 18i ; wing, 18 ; tail, 5 ; bill, 
Off the Columbia River. Common. 
Slender-billed Fulmar, Procellaria tenuirostris, Aud. Orn. Biog. v. v. p. 333. 
GENUS IV. PUFFINUS, Briss. SHEARWATER. 
Bill of the length of the head, rather slender, nearly as 
deep as broad at the base, much compressed toward the end, 
nearly straight, being slightly recurved, with the tips de- 
curved ; upper mandible with a cere at the base, extending 
narrow to the nostrils, which are dorsal, each covered with 
a lateral convex plate, and opening anteriorly, with an 
elliptical aperture, dorsal line as far as the nostrils nearly 
straight, then suddenly deflected, afterwards slightly con- 
cave, towards the end decurved, the ridge very broad and 
convex at the base, narrower beyond the nostrils, from which 
a groove runs obliquely on each side, sides convex, nearly 
erect, edges sharp, tip or unguis strong, decurved, much 
compressed, very acute ; lower mandible with the angle very 
long and narrow, the dorsal line beyond it decurved, the 
F f 
