MANKS SHEARWATER. 605 



length. Body elongated. Feet of moderate size ; tibia feathered to near 

 the joint ; tarsus compressed, anteriorly and posteriorly sharp, covered 

 all over with diversiform scales, of which a series on the inner side is scu- 

 telliform. Toes rather long, slender, excepting the first, which is a mere 

 conical knob principally composed of the claw ; anterior toes connected by 

 striated webs of which the margin is concave, scutellate above, the third 

 and fourth longest and about equal. Claws small, compressed, slightly 

 arched, obtuse, that of third toe with the inner edge a little dilated. 



Plumage dense, soft, blended, on the upper parts rather compact. 

 Feathers of the fore part of the head very short. Wings long, sharp ; 

 primaries tapering, rounded ; first longest, the rest regularly graduated ; 

 secondaries rather short, rounded. Tail rounded, of twelve feathers. 



Bill deep greenish-black. Iris dark brown. Inner and middle of 

 outer side of tibia dingy orange, the rest greenish-black, as is the fourth 

 toe and outer side of the third, the inner side of the latter and the whole 

 of the second dingy orange ; the webs much paler ; claws brownish-black. 

 All the upper parts are brownish-black, the lower white. 



Length to end of tail 15 inches, to end of wings 15^, to end of claws 

 16 ; extent of wings 32 ; wing from flexure 91 ; tail 3^ ; bill along the 

 back 1 1**^, along the edge of lower mandible l^j ; tarsus 1 ^^ ; middle toe 

 li§, its claw i^g. Weight 15 oz. 



The Female is similar to the male. 



