[1921] 
XV. Aves. 
Avcs. 27 
650. — Scholey, G. J. A remarkable 
Cuckoo coincidence. Ool. Rec. London 
1 1921 pp. 63-70. 
Schoppe, W. F. vide Pearl. 
651. — Schorger, A. W. An attack on 
Live Stock by Magpies ( Pica p. hud- 
sonia). Auk Lancaster Pa. 38 1921 
pp. 276-277 ; also Stephens pp. 458- 
459. 
652. — Schumacher, S. Der Burzel- 
docht. Anat. Anz. Jena 52 1919 pp. 
291-301 10 text-figs. 
653. — Schumacher, S. Darmzotten 
und Darmdrusen bei den Waldhuhnern. 
Anat. Anz. Jena 54 1921 pp. 272-381 
4 figs. 
654. — Schuster, L. Beitrage zur Or- 
nithologie Nordostfrankreichs. J. 
Ornith. Leipzig 69 1921 pp. 153-200 
535-570. 
655. — Schuster, L. Tiber Zuruhe- 
gehen und Abzug des Turmseglers 
( Micropus apus). Ornith. Monatsb. 
Berlin 29 1921 pp. 30-31. 
656. — Schut, L. W. Quelques fac- 
teurs avant de l’importance dans 
l’acquisition d’habitudes par les ois- 
eaux. Arch. Neer. Physiol. Sci. Soc. 
Holl. Harlem 5 1921 pp. 244-274 4 figs. 
657. — Schwan, A. Vogelgosang und 
Wetter, physic.alisch - biologisch unter- 
sucht. Vorlaufige Mitteilung. Arch, 
ges. Physiol. Berlin 180 1920 pp. 341- 
347. 
658. — Schwan, A. Tiber die Ab- 
hangigkeit . des Vogelgesanges von 
meteorologischen Faktoren, untersucht 
auf Grund physikalischer Methoden. 
Verhandl. Orn. Ges. Bay. Miinchen 15 
1921 pp. 9-42 1 pi. 
659. — Sclater, W. L. Note on the 
races of the Two-banded Courser and 
on the Red-necked Francolin. Bui. 
Bt. Orn. Cl. London 41 1921 pp. 132- 
135. 
660. — Sclater, W. L. Notes on Afri- 
can birds. Bui. Bt. Orn. Cl. London 
42 1921 pp. 22-25. 
661. — [Sclater, W. L.] Obituary : 
George Wyman Bury. Ibis London 
1921 pp. 151-152. 
662. — [Sclater, W. L.] Obituaries : 
William Warde Fowler, Alphonse 
Dubois, Max Furbringer. Ibis London 
1921 pp. 729-732. 
Sclater, W. L. vide Hartert. 
663. — Sehlbach, F. Tiber Zunahme 
einiger Singvogelarten im Wesertale. 
Orn. Monats. Berlin 29 1921 pp. 102- 
103. 
664. — Seilkopf, H. Ornithologische 
Beobachtungen aus dor Mark Branden- 
burg. Ornith. Monatsbr. Berlin 29 1921 
pp. 60-63. 
665. — Selous, E. Sex habits of the 
Great Crested Grebe. Naturalist Lon- 
don 1921 pp. 173-176 197-200 301-305. 
666. — Seri6, P. Sobre la alimentacion 
de la Perdiz comun ( Nothura maculosa). 
Hornero Buenos Aires 2 1921 pp. 230- 
232. 
667. — Seth-Smith, D. L’elevage en 
captivite de l’Hemipode de Tank. 
( Turnix tanki) et de l’Hemipode varie 
( Turnix varia ). L’Oiseau Paris 2 1921 
pp. 133-138 1 pi. and text-figs and pp. 
181-188 1 pi. and text-figs. 
668. — Seton, E. T. W T hy do Birds, 
bathe ? Bird-Lore Harrisburg Pa. 23 
1921 pp. 124-137 photos. 
669. — Shaver, N. E. A nest study 
of the Maryland Yellow-throat. Univ. 
Iowa Studies Iowa City No. 23 1918 
pp. 3-12 4 pis. 
670. — Sheals, A. Rare birds in 
Ulster. Northern Whig Newspaper 
Jan. 1922 pp. 1-7. 
671. — Sherborn, C. D. and Iredale, T.. 
J. F. Miller’s leones. Ibis London 1921 
pp. 302-309. 
672. — Shikinami, J. Tiber die Ent- 
wickelung der Milzanlage bei den 
Vogeln. Arb. Anat. Inst. Univ. Sendai 
Heft 5 1920 pp. 1-25 8 plates 3 text- 
figs. 
673. — Simon, E. Histoire naturelle 
des Trochilidae (Synopsis et Catalogue)' 
pp vi + 416 Paris (Mulo) 1921 1. 8vo. 
674. — Simpson, S. Pituitary feeding 
and egg production in the domestic 
fowl. Proc. Soc. Exp. Biol. Med. New 
York 17 20 pp. 87-88. 
675. — Slonaker, J. R. The develop- 
ment of the eye and its accessory parts 
in the English Sparrow (Passer 
domesticus). J. Morph. Philadelphia 
35 1921 pp. 263-322 10 text-figs. 17 pis. 
