81 Aves. 
Subject Index. — Ethology — Aetiology. 
5823 
Dio Veranderungen tier llausgefl iigel- 
rassen, ihre Ursachen und Wirkungen ; 
Lavalle, 816. 
Colour anomalies in birds; Vallon, 
1539. 
Variation in some Danish birds ; 
Arctander, 37. 
Mutation in Tlierophaaia sicinlioii ; 
cfhigi, 513. 
Experiments in variation in Coturnix 
coturnix ; Cavazza, 245, 250. 
Variation in canarios’ eggs through 
hybridization; Tsohermak, 1513. 
Ilahnonfedriges Weibchen von 
Cyanecula auecica suecica (Russ.) ; 
Averin, 58. 
Albino variations of the following 
species described : — liallua aquaticus, 
Tender, 1457 : Ereuuetea puaillus, 
Murphy, 989 : Gnllinago gallmago, 
Roller, 775 : Picus major, Dant, 355 : 
Muaeicapa grisola, Averin, 57 : Turdus 
morula, Corbin, 321 : Alauda arvenaia, 
Ternier, 1457 : Emberiza schoeniclus 
Harris, 589. 
A colour variation in Cannabina 
linota ; Martorelli, 912 ; Ruticilla 
tithrjs, Dant, 354. 
Teratology. 
Muscular anomalies in tlio sparrow ; 
Menier, 949. 
Hyperdactyly in the Houdan fowl ; 
Barfurth, 87. 
Observations on a three-legged 
chicken ; Corona, 323. 
Pyrgita petronia, merkwlirdige 
Schnabelbildung ; Dant, 347. 
Anomalie der Luftwege bei einer 
Ente (Russ.); Gladkich, 519. 
Double eggs ; Hargltt, 582. 
Hybrids. 
Bastardierung und Transplantation; 
Schultz, 1327. 
Hybridization and the formation of 
new species ; Ghigi, 516. 
Results of several studies in hybridism; 
Ghigi, 510. 
The testis in Guinea fowl x Common 
fowl hybrids ; Guyer, 562, 
(n-9210 g) 
Esperimenti di ibridismo sui 
piccioui domestici per lo studio della 
revcrsione dei carotteri ; Ghigi, 508. 
Results of hybridizing ring-doves, 
including sex-linked inheritance ; Strong, 
1428. 
The ovary in hybrid ducks ; Chappel- 
lier, 263, 264. 
Studies in hybrid ducks, and mendel- 
lian inheritance ; Goodale, 624. 
The effect of hybridization on the egg 
of the canary ; Tschermak, 1513. 
Hybridization of canaries; Galloway, 
487. 
Indifference sexuelle chez les femelles 
des Fringillides hybrides ; Chappelier, 
262. 
Natural hybrids among the sparrows 
of Algeria ; Rothschild & Hartert, 1244, 
p. 479. 
On the question as to whether Cyaniatea 
pleskei is a hybrid ; Pleske, 1134. 
Notices of hybrids between : Tetrao 
tetrix x Lagopus lagopus ; Palmgren, 
1069, Grieg, 539 : Tetrao tetrix x Phasi- 
anus colcliicus ; Jourdain, 730 : Phasianus 
x Gallus ; Poll, 1142 : Graphophasianus 
soemmeringi x Calophasis ellioti ; Ghigi, 
514: Anaer olbifrona x A. cinereus ; 
Gramm, 332: Anas boaeaa x Spatula 
clypeata ; Arrigoni degli Oddi, 42 : 
Somateria molisaima x A naa boaeaa ; 
Clarke, 293 : Caeatua galerita x C. eos ; 
Cosgrave, 235 : Nucifraga caryocatactea 
earyoeataetea x N. c. macrorhyncliua ; 
Hess, 652. 
Heredity and Evolution. 
Leistungszuclit in direr Einwirkung 
auf Konstitutionskraft ; Schmidt, 1315. 
Evolution and ancestral history ; 
Townsend, 1501. 
On the determination of secondary 
sexual characters in birds ; CUleuls, 
282. 
Stray notes on sexual selection ; Finn, 
440. 
Notes on the history of barred breeds 
of poultry ; Pearl, 1099. 
On the results of inbreeding in 
Canaries ; Kluhs, 764. 
Experiments in Pheasant-breeding; 
transmission of the male’s characters; 
Thomas, 1481. 
e 13 
