PRO CELLARING. THALASSIDROMA. 
265 
lume of his Birds of Europe, by Mr Gould, who states that a 
fine specimen was found on the banks of the Ure, near Tan- 
field, in Yorkshire, on the 8th of May 1837? and is in the pos- 
session of Colonel Dalton of Slenningford. 
Procellaria Bulwerii, Bulwer’s Petrel, Jard. and Selb. II- 
lust. pi. 65. — Bulwer’s Petrel, Thalassidroma l Bulwerii, 
Gould, Birds of Europe, pi. 449. 
320. Thalassidroma Leachi. Leach’s Petrel. 
Tail forked ; bill and feet black ; plumage greyish-black 
tinged with brown ; quills and tail brownish-black ; smaller 
wing-coverts and inner secondaries light grevish-brown ; fea- 
thers of the rump, sides of abdomen, and outer lower tail- 
coverts, white ; upper tail- coverts white, tipped with black ; 
length nearly eight inches. 
Male, 7 t§> 20, 6 T \, T 8 ^, 1, If, 
This Petrel was discovered, in 1818, by Mr Bullock, in the 
island of St Kilda. It has since been repeatedly met with 
on various parts of the coast, and has several times been found 
dead, or in an exhausted state, even far inland, during or 
after stormy weather, in winter. It is said to be plentiful 
on the Banks of Newfoundland, and on some parts of the 
coast of North America. 
Procellaria Leachii, Temm. Man. d’Ornith. ii. 812.— Tha- 
lassidroma Leachi, Leaches or Fork-tailed Petrel, MacGilli- 
vray, Brit. Birds, v. 
321. Thalassidroma Wilsoni. Wilson’s Petrel. 
Tail even ; bill and feet black, but the interdigital mem- 
branes yellow in the middle ; plumage greyish-black tinged 
with brown above, sooty-brown beneath ; outer secondary 
wing-coverts and some of the secondary quills light brown- 
ish-grey, terminally edged with white ; rump, sides of abdo- 
men, and outer lower tail -coverts white ; length seven inches 
and a half. 
Male, 71b. 16, 6? tV? IfW tV 
This species, named by the Prince of Canino in honour of 
the celebrated Scoto-American ornithologist, is said to breed 
on various parts of the coasts of North America, and to occur 
plentifully on the Atlantic Ocean. It is admitted into the 
British Fauna as an occasional visitant, 
Thalassidroma Wilsoni, Bonap. Synops. 367. — Wilson’s 
Petrel, Thalassidroma Wilsonii, Audub. Ornith. Biogr. iii„ 
486 ; v. 645. — Thalassidroma Wilsoni, Wilson’s Petrel, 
MacGillivray, Brit. Birds, v. 
