bulwer’s STORM PETREL. 257 
maritime in habits, and possess an extraordinary 
developement of wing; these have been formed by 
Mr. Vigors into the 
Genus Thalassidroma, Vigors. — Generic charac- 
ters. — Bill short, maxilla hooking downwards 
at the tip ; mandible slightly angulated, follow- 
ing the curve of the maxilla ; nostrils in one 
tube, showing two orifices ; wings long, accu- 
minated, second quill longest, third nearly 
equalling it ; feet rather small, outer too slightly 
longest ; tarsi long and slender ; hallux a small 
sharp dependent claw. 
Types. — T. leachii, pelayica, wilsonii, fyet — Cos- 
mopolite. 
Note. — Hahits entirely maritime ; breed in bur- 
rows ; flight swift ; “ run upon the waves size 
small ; colour black. 
Bulwer’s Storm Petrel, Thalassidroma Bul- 
werii, Jard. and Selby. — Procellaria Bulwerii, 
Jard. and Selby. — Illust. of Om. — Gould, Birds of 
Europe. — Mr. Gould, in the last number of his 
European Birds, writes, — “ On the authority of 
Colonel Dalton of ITenningford, near Ripon, we are 
enabled to add this rare species to the Fauna of 
Britain, from a fine specimen which was found on 
the banks of the Ure, near Tanfield, in Yorkshire, 
on the 8th of May 1837, and which could not have 
been long dead, as it admitted of being mounted as 
R 
