STORM-PETREL. 
157 
tffo are British, viz., Procellaria and Oceanodroma. The third, 
JIalocypiena, is only found off the west coast of North Amor ca, 
from California to Panama, and contains but a single species, 
Jd. microsoma. 
THE STORM-PETRELS. GENUS PROCELLARIA. 
Procellaria, Linn. Syst. Nat. i. p. 212 (1766). 
'Type P. pelagica (Linn.). 
In this genus the tarsus is longer than the middle toe and 
claw and the tail is rounded or nearly even, never forked. 
Only two species of Procellaria are known, P. telhys being 
conLted to the seas of the western coast of South America. 
I. THE STORM-PETREL. PROCELLARIA PItLAGICA. 
Procellaria pelagica, Linn. Syst. Nat. i. p. 212 (1766) ; B. 0. U. 
List Brit. B. p. 196 (1883) ; Saunders, ed. Yarrell’s Brit 
B. iv. p. 42 (1884) ; Seebohm, Hist. Brit. B. 111. p. 438 
’{1885); Saunders, Man. Brit. B. p. (1889); Salvm, 
Cat. B. Brit. Mus. xxv. p. 343 (1896)- _ 
Thalassidroma Macgill. Brit. B. v. p- 4 ° 5 
Dresser, B. Eur. viii. p. 49 1 (1874)' 
{Plate CXIa.) 
Adult Male.— Sooty-black above and belo^9 with mo^e or 
less of a greyish shade ; rump and sides of lower back white , 
upper tail-coverts white, tipped with black ; wing-covcrts sooty 
black the greater series narrowly but plainly edged w'lth wnite , 
Quills’ and tail black; under surface of body sooty browm, 
4aded with grey over the head and face, as well as on the 
throat and chest ; under tail-coverts sooty black, the lateral 
ones white with black tips; ^derwing-coverts sooty black, the 
median series broadly edged with white; bil , legs, and feet 
black ; iris hazel. Total length, 6 inches ; culmen, o 5 , wing, 
4-75 ; tail, 2-1 ; tarsus, o’S. 
Adult remade. — Similar to the male. Total length, 6 inches , 
wing, 4'8 
Nestling. — Enveloped in sooty down, the feathers as they ar 
developed being exactly like those of the adults. 
