LEAST PETREL. 313 
rounded. Tail rather long, broad, slightly rounded, of twelve broad 
rounded feathers. 
Bill and feet black. Iris dark brown. The general colour of the 
upper parts is greyish-black, with a tinge of brown, and moderately 
glossed ; the lower parts of a sooty brown; the secondary coverts mar- 
gined externally with dull greyish-white ; the feathers of the rump and 
the upper tail-coverts white, with the shafts black, the tail-coverts 
broadly tipped with black. 
Length to end of tail 52 inches, to end of claws 5}, to end of wings 
61; extent of wings 133; wing from flexure 5}; tail 2}; bill above 
4, along the edge of lower mandible 3; tarsus 4; middle toe and claw  ; 
outer toe nearly equal; inner toe and claw #. Weight 44 drachms ; 
the individual poor. 
Adult Female. Plate CCCXL. Fig. 2. 
The Female resembles the male. 
A male bird, from Nova Scotia, examined. The upper mandible 
internally has a longitudinal median ridge ; the palate is convex, with 
two lateral ridges. The tongue is 54 twelfths long, emarginate and 
serrulate at the base, very much flattened, tapering to a horny point. 
The heart, Fig. 1, a, is of a very elongated narrow conical form, 2 
twelfths in length, 4 twelfths in breadth at the base. The lobes of the 
liver, 6, c, are equal, 64 twelfths long. The cesophagus, d, ¢, is 1 inch 
10 twelfths long, of a uniform diameter of 21 twelfths; behind the 
liver, it enters as it were a large sac, f, g, h, 9 twelfths of an inch long, 
which gradually expands to a diameter of 6 twelfths, forming a broad 
rounded fundus g, then curves forwards on the right side, and at / ter- 
minates in a small gizzard, about 3 twelfths long, and nearly of the 
same breadth, from the left side of which comes off the intestine. The 
latter passes forward, curving to the right, behind and in contact with 
the posterior surfaces of the liver, then forms the duodenal fold, h, j, & 
in the usual manner. The intestine, on arriving at the right lobe of 
the liver, at 4, receives the biliary duct, curves backward beneath the 
kidneys, and forms several convolutions, which terminate above the 
proventriculus. It then becomes much narrower, and passes directly 
backward, in a straight course to the rectum, which is only 4 twelfths 
of an inch long. The cceca are oblong, 13 twelfth in length, and 
7 
