Very rare 
visitant. 
< 
ry * 
528 NATATORES. PUFFINUS. SHEARWATER. 
doubt, greatly facilitates that singular practice of running 
along the surface of the waves, which they are so frequently 
seen to exhibit when in search of their food. In habits they 
approach the succeeding genus T’halassidroma (Storm Pe- 
trels), feeding by night rather than by day. They breed in 
the holes of rocks, rabbit-burrows, &c. and lay a single white 
ege of a large size. Their food consists of putrescent fish, 
cetaceze, marine worms, and other floating animal matter. 
Their flight is rapid, and they are observed to be particularly 
alert during dark and tempestuous weather. 
CINEREOUS SHEARWATER. 
Purrinus cinEREUS, Steph. 
PLATE CII *. 
Puffinus cinereus, Steph. Shaw’s Zool. 13. 227. 
Procellaria cinerea, Gmel. Syst. 1. 563.—Lath. Ind. Orn. 2. 824. sp. 10. 
Procellaria Puffinus, Linn. Syst. 1. 513. 6.—Gmel. Syst. 1. 566. 
Le Puffin, Buff: Ois. 9. 321.—Jd. Pl. Enl. 962. 
Pétrel Puffin, Temm. Man. d’Ornith. 2. 805. 
Cinereous Petrel, Lath. Syn. 8. 405. 10. 
Cinereous Shearwater, Shaw’s Zool. 13. 227. 
I am induced to add this species of Shearwater to the 
list of our Fauna, in consequence of a specimen that lately 
came into my possession, obtained upon the coast of Nor- 
thumberland. Its size is about a third larger than that of 
the succeeding species, which it resembles in general form ; 
and its bill, as in TEmmtncr’s description, is turned slightly 
upwards in front of the nostrils, which latter are formed of 
two tubes, rather depressed anteriorly, and opening by sepa- 
rate truncated apertures. This appears to be a common 
bird in the Mediterranean, and on the coast of Spain, but 
does not seem to have been hitherto recognised as a British 
visitant, though in all probability it may occasionally have 
been killed here, but always confounded with the other one 
