PETRELS. ares 
(P. Z. S. 1832, p. 128) *, or belong to a species not yet 
recognized as British. I have seen two or three spe- 
cimens of a Shearwater taken on different parts of the 
English coast, intermediate in size between P. major 
and anglorumt; and I have little doubt that a careful 
examination of these would result in the establish- 
ment of a fourth species of Puffinus in the British list. 
Not having had the opportunity of examining the 
specimens above noticed, I consider their species for 
the present undetermined, with the exception of the 
first on the list, but refer to the records of their 
capture, for convenience, under the head of the species 
to which they have been thought to belong. 
Those who may investigate this question will derive 
considerable assistance from a perusal of Dr. Elliott 
Coues’s “ Critical Review of the Family Procellaride,” 
published in the ‘ Proc. Acad. Nat. Sci. Philad.’ 1864, 
pp. 72 & 116, and 1866, pp. 20 & 134; and of 
Professor Newton’s remarks on the subject in the 
‘ Zoologist’ for 1852, pp. 3691-3698. 
CAPPED PETREL. (Mstrelata hesitata (Kuhl)f. 
Hab. Atlantic coast, from Florida to New York, and the 
West Indies. 
* This specimen was killed at Bridlington in Yorkshire. 
+ The species recorded by Yarrell as the Cinereous Shearwater, 
it will be recollected, is considerably smaller than anglorum. 
+ In determining the generic relationship of this bird I have 
followed the nomenclature adopted by Dr. Elliott Cowes in his 
excellent monograph above mentioned (ef. Proc. Acad, Nat. Se. 
Philad. 1866, p. 139). 
N 
