82 Axes. 
XVII. Aves. 
[1910] 
Ueber eine Schnabelanomalie bei 
Gorvus cor one ; Laubmann, 840. 
,,Hasenscharte“ einer jungen Ente 
(Russ.); Skriabin, 1400. 
On a case of posterior dichotomy in 
an Aylesbuiy Duckling ; Bullen, 186. 
Note on three cases of a super- 
numerar}' toe in the Broad-winged 
Hawk; Beebee, 103. 
Polydaktylic beim Huhn ; Cramer, 
322. 
Account of a case of incomplete 
hermaphroditism in the domestic fowl ; 
Pearl & Curtis, 1150. 
Duplicity in chick emlnyos and a 
case of ovum in ovo ; O’Donoghue, 
1077. 
' Keimzellenbildung bei Mischlingen ; 
Poll, 1188. 
See also Rummer, 828 ; Pearl, 
1149; Tur, 1567, 1568; Yoshida, 
1695. 
Hybrids. 
On the sex of hybrid birds ; Guyer, 
569. 
Bastarde und Bastardzuchtungen, 
beriehtete in d. ,,Gefied. Welt‘‘ Jg 
1-38; Braune, 166. 
Cases of natural hybrids among the 
Humming birds; Simon, 1396. 
Notes on hybrids between Gennaeus 
albicristatus x G. swinhoei ; Thomas, 
1505 : Phasianus colchicus x Tetrao 
tetrix ; Schaff, 1328 : Tetrcio tetrix x 
T. urogallus ; ' Gladstone, 527 : Anas 
boschas x Spatula clypeata ; Arri- 
goni degli Oddi, 41 : Anas boschas x 
Dajila acuta ; Karejev, 766 : Colaptes 
auratus luteus x C. cafer collaris ; 
Baldwin, 66 : Turdus merula x T. 
torquatus ; Bonliote, 135 : Taenio- 
pygia castanotis x Munia oryzivora ; 
Decoux, 347 : Neochmia phaeton x 
liathilda ruficauda ; Astley, 47 ; 
Hyphantornis cucullatus x H. spilo- 
notus ; Holden, 681. 
Heredity and Evolution. 
The factor hypothesis in its relation 
to plumage color ; Davenport, 337. 
Inheritance of characteristics in 
domestic fowls; Davenport, 336. 
Canary breeding and Mendelism ; 
Davenport, 338 : Galloway, 501 : 
and Heron, 663. 
The development of the naked-neck 
character in the naked-necked fowl ; 
Conte, 313. 
On the inheritance of the barred 
color pattern in poultry ; Pearl & 
Surface, 1152. 
A biometrical study of egg pro- 
duction in the domestic fowl ; Pearl & 
Surface, 1151. 
Remarks on heredity in Silver and 
Swinhoe Pheasant hybrids raised in 
captivity; Thomas, 1505. 
Vererbung friihen Legens beim Huhn 
(Russ.); Bdllajev, 108. 
Einigo Bomorkungen iiber die Ver- 
wandtschaft der Vogel und Dino- 
saurien ; Versluys, 1590, 
Extinct Birds. 
The holocene avian fauna of North- 
West Germany ; Lons, 896. 
Bird remains in the cavo-carth at 
Dog Holes, Warton Crag, N. Lanca- 
shire ; Jackson, 731. 
A list of birds of the ‘‘Stone-age” 
found in Denmark ; Winge, 1668. 
On some tertiary bird remains from 
Bohemia ; Laube, 838. 
An impression of a fossil feather in 
the tertiary ironstone of Redruth, 
Victoria ; Chapman, 279. 
Fossil birds from the Quaternary 
deposits of Southern California with 
descriptions of four new forms {vide 
Cathartidiformes p. 105) ; Miller, 
1008, 1009, 1010. 
Odontopteryx longirostris sp. n. from 
tertiary deposits of Brazil described ; 
Spulski, 1422. 
Description and figures of the bones 
of the extinct King Island Emu 
( Dromacus minor) ; Spencer & Kershaw, 
1421. 
Fregilupus varius and Alca impennia 
in the Selys-Longchamps collection, 
figured ; Fraipont, 485. 
Remarks on Alca impennis (Nor- 
wegian) ; Collett, 308. 
The Passenger Pigeon ( Eclopistes 
migrator ius) ; the last survivor in 
