Bell).

Blanchard, E.--Preuves de la Formation Recente de la Mediterranee,
"Comptes Rendus," vol. xciii., 1881.

Blanford, W. T.--Address delivered at the Anniversary Meeting of the
Geological Society of London, 1890.

Blytt, A.--"Essay on the Immigration of the Norwegian Flora," 1876.

Boettger, O.--=a.= System. Verzeich. d. lebenden Arten d.
Landschneckengattung Clausilia, "Ber. Offenbach Ver. f. Naturkunde,"
1878. =b.= Entwicklung d. Pupa Arten d. Mittelrheingebiets, "Jahrbuch d.
nass. Ver. f. Naturw.," vol. xlii.

Bogdanov, M. M.--Quelques mots sur l'histoire de la faune de la Russie
d'Europe, "Archives des Sciences physiques et naturelles" (N.S.), vol.
lvi., 1876.

Bonney, T. G.--"Ice-work, Present and Past," 1896.

Boulenger, G. A.--British Museum Catalogue (Amphibia), 1882.

Bourguignat, J. R.--Distribution geographique des Mollusques terrestres
et fluviatiles en Algerie, "Annales des Sciences naturelles" (5th ser.),
vol. v., 1864.

Brandt, J. F.--Zoogeographische und Palaeontologische Beitraege,
"Verhandl. der Kais. russ. Mineral. Gesell." (2nd ser.), vol. ii., 1867.

Brauer, A.--Die Arktische Subregion, "Zool. Jahrbuecher" (Abth. System.),
1888.

Brehm, A. E.--"From North Pole to Equator," 1896.

Brooke, Sir V.--On the Classification of the Cervidae, "Proc. Zool. Soc.
London," 1878.

Bulman, G. W.--The Effect of the Glacial Period on the Fauna and Flora
of the British Islands, "Natural Science," vol. iii., 1893.

Bunge, D.--La faune eteinte des bouches de la Lena et des iles de la
Nouvelle Siberie, "Congres Intern. de Zoologie," vol. ii., Moscow, 1892.

Carpenter, G. H.--Problems of the British Fauna, "Natural Science,"
vol. ii., 1897.

Christ, H.--"Das Pflanzenleben der Schweiz," 1879.

Cole, G. J.--Borderland, "Irish Naturalist," vol. vi., 1897.

Credner, R.--Die Reliktenseen, "Petermann's Geog. Mitth.," 1887.

Croll, J.--"Climate and Time," 1875.

Darwin, C.--"Origin of Species," 6th ed., 1878.

Dawkins, W. Boyd.--=a.= "Early Man in Britain," 1880. =b.= "The British
Pleistocene Mammalia," part A, Preliminary Treatise, 1878. =c.= The
Former Range of the Reindeer in Europe, "Popular Science Review," vol.
vii., 1868.

Drude, O.--Betrachtungen ii. d. hypothetischen vegetationslosen Einoeden
im temperirten Klima der Noerdlichen Hemisphaere zur Eiszeit, "Petermann's
Geog. Mitth.," vol. xxxv., 1889.

Emery, C.--On the Origin of European and North American Ants, "Nature,"
vol. lii., 18