338 



Mr. W. P. Py craft on the 



feature of this syrinx, and so far as I know it has been met 

 with in no other bird, while its peculiarity is still more 

 increased by the lingulate plate of cartilage attached thereto. 

 That this intercalary semi-ring belongs to the syringeal 

 and not to the bronchial system of rings is shown, I think, 

 partly by its relationship to the syrinx and partly by the 

 fact that the intrinsic muscles (text-fig. 6, B.t.) are attached 

 to the next pair of setni-rings, which have all the form and 

 relations of bronchial rings. Further, be it noted, they, like 



Text-fio-. 7. 



S.f.s.r. 



Syrinx of Jack Snipe, seen from the left side. 

 Additional letters: Ex.m. = Extrinsic muscle. 



the rest of the bronchial rings, are wholly cartilaginous, 

 while this peculiar semi-ring is partly osseous, agreeing in the 

 extent of its ossification with the rings immediately cephalad. 

 In text-fig. 7 the general appearance of this syrinx in side 

 view is shown, and should greatly assist the reader in grasping 

 the peculiarities just described. 



