OSTEOLOGY OF BIRDS 357 



greater number of the Old World bird forms than I have up to 

 this writing. It is earnestly to be hoped that man will not destroy 

 the entire class, as they now exist, before we at least gain a more 

 certain insight, a more profound knowledge, of their anatomy and 

 their affinities. 



Owing to the great number of places in which my papers on 

 avian anatomy have appeared during the past twenty years, I 

 learn through many inquiries from naturalists in various parts of 

 the world that considerable difficulty is experienced in finding them 

 and consulting them. In order to obviate this, I here append the 

 following : 



BIBLIOGRAPHY OF THE AUTHOR'S WRITINGS THAT 



BEAR DIRECTLY UPON THE ANATOMY AND 



CLASSIFICATION OF BIRDS 



The author in selecting these titles from the list of his published and 

 manuscript works has omitted all of his scientific and popular ornithological 

 papers not especially concerned with avian anatomy or taxonomy, though 

 in not a few instances they contained facts of interest and of some im- 

 portance to the classifier of birds. 



1 Osteology of Speotyto cunicularia hypogaea. U. S. Geog. & 



Geol. Sur. Terr. Dep't of Interior Bui. Washington, 

 D. C. Feb. II, 1 88 1, v. 6, no. i, p. 593-626, pi. 1-3. 



2 Osteology of Eremophila alpestris. Ibid. p. 627-52, pi. 4, 



3 Osteology of the North American Tetraonidae. Ibid. p. 653- 



718, pi. 5-13. 



4 Osteology of Lanius ludovicianus excubitorides. Ibid. p. 719- 



26, pi. 14. 



5 Osteology of the Cathartidae. Ibid. p. 727-802, pi. 15-22. 



Numerous text figures. 



6 On the Ossicle of the Antibrachium as Found in Some of the 



North American Falconidae. Nutt. Ornith. Club Bui. 

 Oct. 1881. p. 197-203, 



7 The Claw on the Index Digit of the Cathartidae. Am. Nat. 



Nov. 1 88 1, p. 906-8. 



8 Notes upon the Osteology of Cinclus mexicanus. Nutt. Ornith. 



Club Bui. Cambridge, Mass. Oct. 1882. v. 7, no. 4, p. 213-21. 

 Cuts. 



