Recently published Ornithological Works. 253 



47. Finn on Hybrids of the Guinea-fowl. 



[On Hybrids between the Guinea-fowl and Common Fowl. By F. 

 Finn, B.A., F.Z.S. J. A. S. B. lxxi. pt. ii. pp. 91, 92, pi. vi., 1902.] 



The author describes, with a figure, three hybrids caught 

 in the wild state and sent to the Calcutta Zoological 

 Gardens. 



48. Finn on Variation in Birds. 



[General Xotes on Variation in Birds. By F. Finn, B.A.. F.Z.S. 

 J. A. S. B. lxxi. pt. ii. pp. L54-184, pis. viii., ix.', 1902.: 



This paper treats of (1) Striking cases of Variation 

 in structural characters, (2) Colour Variation in Wild 

 Birds, (3) Reversion to normal colour in abnormal varieties, 



(4) Variation in relation of immature to adult plumage, 



(5) Variation in prepotency, (6) Progressive Variation, (7) 

 Variation directly induced by confinement, (8) Pathological 

 Variation, (9) Spontaneous Variation under domestication, 

 (10) Mor.nl Variability, (41) Variation in mental powers. 

 (12) Variation in taste, (13) Variation in habits. The 

 author concludes that domestication does not directly induce 

 variation, but gives varieties a better chance of surviving ; 

 that climate does not directly induce it, but may weed out 

 colours correlated to unsuitable constitutions. 



I!>. Grinnell on Californian Birds. 



[Pacific Coasl Avifauna. — No..'!. ( 'heck-list of Californian Birds. By 

 Joseph Grinnell. Cooper Ornithological Club of California. Santa Clara, 

 June 1902. Boy. 8vo. 98 pp.] 



This list of 191 species — with an appendix containing 33 

 that are doubtful — has evidently been composed with great 

 care, both as regards the identification of specimens and 

 their provisional assignment to proper areas. To each 

 specific name is added a synonymy referring only to Cali- 

 fornian literature, and a paragraph on the status (including 

 range, comparative abundance, and season of occurrence). 

 The nomenclature of the A. O. U. Check-list is not in- 

 variably adopted, but reference numbers to it are given in 



