Brewster oh a Petrel j/ezc to North America. 95 



of nearly pure plumbeous. Around this colored tract there is nowhere a defi- 

 nite line of demarcation : the cinereous of the neck fades imperceptibly into 

 the white of the throat, and the edges of the abdominal bar become mingled 

 with white, until the dark color is entirely lost along the sides under the 

 wings, and at the beginning of the under tail coverts; while forward, on 

 the lower part of the breast, and over the ventral region generally, the 

 feathers are spotted, barred, or finely vermiculated. in varying shades of 

 color. The sides of the head backward to behind the eye (where the 

 band of color already described begins), are essentially white, but the 

 feathers immediately below the eve are obscurely banded, and there is a 

 narrow but distinct transocular fascia of a dark color, which barely inter- 

 rupts a broad and pure white superciliary-line passing from the bill to a 

 short distance behind the eye. The forehead and crown are much mixed 

 with white. On the forehead the white forms a broad edging to the 

 feathers and extending more narrowly around their tips confines the 

 plumbeous ashy to triangular central patches ; but towards the crown it 

 becomes restricted to the edges alone and when the occiput is reached, 

 o-ives wav entirely to the uniform plumbeous of that part. 



The peculiar color and marking of the wings, alike in both specimens, 

 has already been so well treated by Dr. Cones that I will save repeating 

 these details bv referring the reader to his description, previously quoted in 

 the present article. But in this connection it is necessary to call attention 

 to two points which are not there noticed. The first is, that the seconda- 

 ries, as well as the primaries, have the white areas on their inner webs. The 

 second, that each successive primary, beginning with the first, is lighter 

 and more plumbeous than the preceding one : but with the first secondary, 

 the color abruptly darkens again, becoming on the exposed portion nearly 

 black, and continuing uniformly so to the tertials. which are of an equally 

 dark cast. 



The bill is black: the tarsus, obscure fiesh-color with a bluish tinge. 

 The basal third of toes, with contained webs, pale yellowish; the terminal 

 portion, black. 



Dimensions. Bill (chord of culmen), 1.03 inches. Height at base, .46; 

 width. .42. Tarsus, 1.37. Outer toe and claw. 1.65; middle, 1.70; inner. 

 1.43. Wing, 9.SS. Tail. 3.95; the graduation of the rectrices. .90. 



Young {$) No - 15-706. National Museum. Antartic Ocean, lat. 68° S., 

 long. 95 W., March 21. (Peale's type of Procellaria gularis). Above 

 cinereous-brown, inclining to black on the tips of the secondaries and 

 tertials; below, sooty-plumbeous; throat and under tail-coverts white, 

 transocular facia; broad and dark. Otherwise generally similar to the 

 adult (as represented by specimen No. 5224). 



Dimensions. Bill (chord of culmen), 1.05. Height at base, 50 ; width 

 .4^. Tarsus, 1.35. Outer toe and claw. 1.65; middle do.. 1.65 ; innerdo.. 

 1.36. Wing, 9.80. Tail, 3.90; graduation of the rectrices. .60. 



But before leaving the subject it becomes necessary to consider 

 a Petrel which was unknown when Dr. Coues investigated the 



