20 Aves. 
XVII. Aves. 
[1909] 
Dubois. Comment on doit envisager 
le type du Buceros sharpii de Elliot. 
Paris Bui. soc. zool. 34 1909 (129-133). 
416 
Dubois, A. De la sp^cificite des 
Merula fuscata et naumanni. Paris 
Rev. Fr. d’Orn. 1 1909 (33-34). 417 
Dubois, A. Reflexions sur l’esp&ce 
en ornithologie. Paris Rev. Fr. d’Orn. 
1 1909 (113-115). 418 
Dubois. A. Steganopodes fam. 
Pelecanidae in Wytsman’s Genera 
Avium. 7th part (4) 1 plate Brussels 
1907 4to. 419 
Dubois, A. Picariae fa'm. Musco- 
phagidae in Wytsman’s Genera Avium. 
8th part (9) 2 plates Brussels 1907 4to. 
420 
Duerden, J. E. The domesticated 
ostrich in South Africa. Pretoria J. S. 
Afrie. Ornith. Union 5 1909 (5-16) ; 
also Cape Town Rep. S. Afrie. Ass. 6 
1909 (155-161). 421 
Duesberg, J. Ueber Chondriosomen 
und ihre Verwendung zu Myofibrillen 
beim Hiihnerembryo. Anat. Anz. 
Jena 34 ErgH. 1909 (123-127) 1. Taf. 
422 
Duffaut. Le loriot. Toulouse Bui. 
soc. hist. nat. 41 1908 (68-70). 423 
Duncalfe, A. H. Nesting of the 
Nightingale ( Baulias luscinia) on the 
borders of Staffordshire and Shrop- 
shire. Zoologist London 13 1909 (28- 
29) . 424 
Duncalfe, A. H. Nesting of the 
Lesser Spotted Woodpecker ( Dendro - 
copus minor) and the Great Spotted 
Woodpecker {D. major) in Stafford- 
shire. Zoologist London 13 1909 (29- 
30) . 425 
Dwight, J[onathan], jun. The Blue- 
bird ( Sialia sialis) in Qucbeo. Auk 
Cambridge Mass 26 1909 (83). 426 
Dwight, Jonathan, jun. The sin- 
gular case of the Black Duck of North 
America. • Auk Cambridge Mass. 26 
1909 (422-426). 427 
Dwight, J. The popular names of 
birds. Condor Hollywood Cal. 11 
1909 (43-45). 428 
Dybowski, B. Notatki naukowe. 
[Notices scientifiques.] Kosmos Lwow 
34 1909 (508-512). 429 
Eckardt, Wilh. R. Ueber die Ent- 
stehung des Vogelzuges. J. Ornith. 
Leipzig 57 1909 (32-42). 430 
Eckardt, Wilh. R. Ueber die Griinde 
der Entstehung des Vogelzuges. Natur 
u. Kultur Munchen 6 1909 (528-531). 
431 
Eckstorm, Fannie Hardy. The 
Meadowlark in Maine, and other notes. 
Auk Cambridge Mass. 26 1909 (430- 
432). 432 
Eifrig, G. Birds observed at Ottawa, 
Ontario, winter 1908-9. Ottawa Nat. 
22 1909 (262-265). 433 
Eifrig, G. The Prairie Warbler 
{Dendroica discolor) in northern On- 
tario and other notes. Ottawa Nat. 
23 1909 (113-115). 434 
Eifrig, G. Winter birds of New 
Ontario, and other notes on northern 
birds. Auk Cambridge Mass. 26 1909 
(55-59). 435 
Eifrig, G. The Grasshopper Sparrow 
at Ottawa, Ontario. Auk Cambridge 
Mass. 26 1909 (432). 436 
Eifrig, G. The Prairie Warbler 
{Dendroica discolor) in northern On- 
tario. Auk Cambridge Mass. 26 1909 
(432-433). 437 
Eifrig, G. Additions to the list of 
birds of Allegany and Garrett counties, 
western Maryland. Auk Cambridge 
Mass. 26 1909 (437-438). 438 
Ekman, Sven. Ett bidrag till s&ng- 
svanens liistoria i Skandinavien. [A 
contribution to the history o l Gygnus 
cygnus in Scandinavia.] Fauna ocli 
Flora Uppsala 3 1908 (292-297). 439 
Eldred, E. J. H. The Great Bustard, 
observations and remarks on some 
in captivity and attempts to domesti- 
cate them. Norwich Trans. Nat. Soc. 
8 1909 (727-731). 440 
Elliot, D. G. Remarks on the species 
of the genus Rheinardtius. Ann. Mag. 
Nat. Hist. London (8) 4 1909 (242-243). 
441 
Elliott, J. S. Notes on the nesting 
of the Sparrow-Hawk {Accipiter nisus). 
Zoologist London 13 1909 (467-468). 
442 
Ellis, G. W. and Gardner, J. A. 
The origin and destiny of cholesterol 
in the animal organism. Part iv. 
The cholesterol contents of eggs and 
