92 On the Periods occupied by Birds in Incubation. 



Gray's ' Birds of the West of Scotland/ 1871. 



Greene's ' Parrots in Captivity/ (3 vols.) 1884-87. 



' The Ibis.' (Several years.) 1875 &c. 



Macgillivray's ' History of British Birds.' (5 vols.) 

 1837-52. 

 ^Meyer's^ British Birds/ (7 vols.) 1842-50. 



Montagu's ' Ornithological Dictionary ' and Supplement. 

 (3 vols.) 1802-13. 

 ^Morris's ' History of British Birds.' (1st ed., 6 vols.) 1851 . 



Mosenthal & Harting's ' Ostriches and Ostrich Farming.' 

 1877. 



Muirhead's ' Birds of Bewickshire.' (Vol. I.) 1889. 



Naumann's ' Naturgeschichte der Vogel Deutschlands.' 

 (13 vols.) 1822-44. 



Owen's ' Anatomy of Vertebrates.' (Vol. II.) 1866. 



Royal Physical Society, Edinburgh, Proceedings of. 

 (Vol. IV.) 1874-78. 



Saunders's ' Manual of British Birds.' 1889. 



Saxby's ' Birds of Shetland.' 1874. 



Seebohm's 'History of British Birds.' (3 vols.) 1883-85. 



Selby's ' British Ornithology.' (2 vols.) 1833. 



Stevenson's ' Birds of Norfolk.' (3 vols.) 1866-90. 



Syme's 'Treatise on British Song Birds.' 1823. 



Tegetmeier's ' Pheasants/ (2nd ed.) 1881. 



Thienemann's ' Systematische Darstellung der Fortpflan- 

 zung der Vdgel Europa's.' (Introduction, p. xii.) 1825. 



Thienemann's 'Fortpflanzungsgeschichte der gesammten 

 Vogel.' 1845-56. 



Tiederaann's 'Anatomic und Naturgeschichte der Vogel.' 

 (Vol. II. pp. 136-139.) 1814. 



Walker, Dr. J., MS. in Edinburgh University Library. 

 1787. 



White's 'Nat. Hist, of Selborne.' (Capt. T. Brown's 

 edition.) 1856. 



Wilson & Bonaparte's ' American Ornithology.' (Sir W. 

 Jardine's edition : 3 vols.) 1876. 



* Morris seems to have taken his data from Meyer, who again probably 

 followed i^aumann. 



