18 Aves. 
XV. Aves. 
[1921] 
422. — Lourbet, J. Le sans de 
l’orientation chez les oiseaux. Rev. 
Sci. Paris 59 1921 pp. 694-5. 
423. — Lowe, P. R. On a new 
Willow-Titmouse from northern Italy. 
Ann. Mag. Nat. Hist. London (9) 8 
1921 pp. 443-444. 
424. — Lowe, P. R. New Seed-Snipe, 
Whimbrel and Lapwing described. 
. Bui. Bt. Orn. Cl. London 41 1921 pp. 
109-111. 
425. — Lowe, P. R. New races of 
Oceanites and Puffinus. Bui. Bt. Orn. 
Cl. 41 1921 pp. 140-141. 
426. — Lowe, P. R. Remark on the 
status and systematic position of 
Poecile poecilopsis, Oreophilus ruficollis, 
Charadrius placidus. Bui. Bt. Orn. Cl. 
London 42 1921 pp. 18-19. 
427. — Lowe, P. R. & Mackworth- 
Praed, C. The last phase of the sub- 
species. Ibis London 1921 pp. 344-347. 
428. — Lowe, W. P. The birds of 
Tasso and adjoining Islands of the 
Rokelle River, Sierra Leone. With 
notes by D. A. Bannerman. Ibis 
London 1921 pp. 265-282 1 map. 
429. — Lucanus, F. von. Vortrag 
iiber das Orientierungsvermogen der 
Vogel. J. Ornith. 69 1921 pp. 106- 
111 . 
430. — Lucanus, F. von. Zur Frage 
der Mimiliry der Kuckuckseier. J. 
Ornith. Leipzig 69 1921 pp. 239-258. 
431. — Lucanus, F. von. Ueber des 
Orientierungsvermogen der Zugvogel. 
J. Psychol, u. Neurol. Leipzig 26 1921 
pp. 300-313. 
432. — Lynch, R. S. The cultivation 
in vitro of liver cells from the chick 
embryo. Amer. J. Anat. Philadelphia 
29 1921 pp. 281-311 25 figs. 
433. — Lynes, H. Notes on the 
Natural History of Jebel Marra. 
Sudan Notes and Records 4 1921 pp. 
119-137. 
434. — McAtee, W. L. The “ One- 
letter ” rule for generic names in zoology. 
Amer. Nat. New York 55 1921 pp. 89- 
96. 
435. — McAtee, W. L. Farm help 
from the birds. Yearbook CJ.S. Dept. 
Agric. Washington for 1920 1921 
pp. 253-270 many figs. 
436. — Macfarlane, A. M. The birds 
of Loch-ness-side. Trans. Inverness 
Sci. Soc. 8 1921 pp. 213-227. 
437. — McGilp, J. N. The Black- 
banded Whitefaee | Aplielocephala nigri - 
cincta]. Emu Melbourne 21 1921 
pp. 49-50. 
438. — McGregor, R. C. New or 
noteworthy Philippine Birds, iii. 
Philippine J. Sci. Manilla 18 1921 
pp. 75-82 4 pis. 
439. — McGregor, R. C. Birds of 
Antique Province, Panay, Philippine 
Isds. Philippine J. Sci. 18 1921 pp. 537- 
553 2 pis. 
440. — Mackworth-Praed, C. W. A 
new subspecies of Francolin. Bui. 
Bt. Orn. Cl. London 41 p. 111. 
Mackworth-Praed, C. W. vide Lowe. 
MacPherson, J. vide Wolstenholme. 
441. — Madden, J. F. The birds of 
Rugby (1915-20). Rep. Rugby Sch. 
Nat. Hist. Soc. for 1920 1921 pp. 37-50. 
442. — Magnan, A. De l’action tour- 
billonnaire de l’eau sur le corps et 
la queue des oiseaux plongeurs. 
C. R. Acad. Sci. Paris 172 1921 pp. 230- 
238. 
443. — Magnan, A. De la variation 
en poids des muscles abaisseurs et 
releveurs de l’aile suivant l’etendue 
de la surface alaire chez les oiseaux. 
C. R. Acad. Sci. Paris 172 1921 pp. 1077- 
1079. 
444. — Magnan, A. Le rapport de la 
surface alaire a la surface caudale 
chez les oiseaux. C. R. Acad. Sci. 
Paris 172 1921 pp. 1245-1247. 
445. — Magrath, H. H. F. Kashmir 
bird notes. J. Bombay N. H. Soc. 
28 1921 pp. 276-279. 
446. — Mailliard, J. Notes on some 
specimens in the ornithological collec- 
tion of the California Academy of 
Sciences. Condor Berkeley Cal. 23 
1921 pp. 28-32. 
447. — Mailliard, J. Anent Red- 
winged Blackbirds ( Agelaius ). Condor 
Berkeley Cal. 23 1921 pp. 66-68. 
