Mr. A. Hunie on Indian Ornittiulugy. 413 



plumes to tip 3-5, from anterior angle of eye 5"15, from gape 4 ; 

 tarsus 4*05 ; raid toe to root of claw 5 ; bind toe 1 ; foot, greatest 

 length, 8-37; breadth 6-62. Weight 15 lbs. 



Female. Length 53*12 inches; expanse 84-37 ; wing 21-38; 

 bill at front, from frontal plumes straight to tip 3*55, from 

 anterior angle of eye 4*75, from gape 39; tarsus 3*8; mid toe 

 to root of claw 4-8; hind toe 0-7; foot, greatest length 7*5, 

 greatest width 6-5. Weight 13 lbs. In both the irides were 

 dark brown. 



I cannot satisfactorily identify this species ; it is too large for 

 Cygnus americanus ; and, moreover, neither the distribution of 

 colour on the bill corresponds, nor is there any trace of either 

 the deep leaden tint of the plumage of the young or the light 

 bluish grey of the adult in winter. It is, of course, much too 

 big for Bewick's Swan ; while, as regards the Hooper, the black 

 of the bill is at the base, and not at the tip as in this latter. 



There remains the Mute Swan, which unfortunately is not 

 included by Macgillivray, and in regard to which neither Yarrell 

 nor the Naturalist's Library gives detailed measurements or any 

 full description of the young ; but it would appear that the 

 colouring of the young in this species is a nearly uniform sooty 

 greyish brown above and a lighter shade of greyish brown below. 

 Moreover there is not the faintest trace of a tubercle, and the 

 shape of the bill is entirely that of C. americanus and not at all 

 that of C. olor as figured by Yarrell. From the frontal feathers 

 to beyond the end of the nasal fossae, a distance of very nearly 

 1^ inch, the culmen is a perfectly straight line. Beyond this 

 there is a very shallow concavity to the posterior margin of the 

 nail. It seems hardly possible that this should be a new spe- 

 cies ; but unless, notwithstanding all that I have said, they are 

 really the young of C. olor or else of C. buccinator* (of which 

 latter I know nothing), they must be new, and should bear the 

 name of their discoverer. Captain Unwin, and should stand as 

 Cygnus unwini. 



* [The bill of C. buccinator is entirely black. The birds here described 

 appear to us to be referable to the young of C'yynus olor, the tubercle of 

 the bill being undeveloped and the yellow of the anterior portion of the 

 bill not yet assumed. — Ed.] 



