in a new Species of IVild Swan. 3 



origin and at their junction with the lungs, but greatly expanded throughout 

 the intermediate portions, and somewhat depressed, being one inch one line 

 wide, and only eight lines in depth. 



The muscles of voice are the same in number and situation as in the Hooper 

 and Cygnus Beivickii. 



The whole length of the sternum is nine inches three lines, the greatest 

 width four inches ; the hollow protuberance on its internal surface is formed 

 by a sudden rounded elevation of the superior bony plate, which is compressed 

 at the sides, and measures in length as also in height one inch six lines, and 

 in width nine lines ; from the edge of the keel to the upper surface of the 

 protuberance three inches five lines. 



The following other measurements are here inserted for comparison with 

 those of our British wild swans in the last-published Part of the Transactions 

 of this Society. Inches. Lines. 



Point of beak to the end of the tail 70 







edge of the forehead ... 411 



6 

 

 



eye 



occiput 8 



Carpus to the end of the primaries 24 



Tail-feathers, in number, 24. 



Length of tarsus ^ 



■ middle toe and nail 6 9 



• the breast-bone 9 ^ 



6 





 



Depth of insertion of the trachea 6 



Length of the bronchial tubes 2 



A fine preserved specimen of the Trumpeter in the museum of the Hudson's 

 Bay Company, in Fenchurch Street, afforded the external measurements here 

 detailed. Two skins of swans of the same species in the collection of the 

 Zoological Society are from younger birds, and are somewhat smaller in their 

 several dimensions. 



The Hooper, it will be recollected, has but one decided convolution of the 

 trachea within the sternum, and that one is vertical ; Bewick's swan has also 

 but one convolution, and that horizontal ; our present subject, it will be seen, 



b2 



