22 Aves. 
AYES. 
[Koenig - Wartiiausen, R.] “ Bauchschwangerschaft ” bei Vogeln 
T. c. pp. 316-320. 
^Kolombatovio, G. Imenik Kraljesnjaka Dalmacije. i, dio Sisavci i 
Ptice. ii, e Aggiunte al vertebrati della Dalmazia. Split [Spalato] : 
1885, 8vo, 38 pp. 
A catalogue of the Vertebrates of Dalmatia. 
. Imeuik Kraljesnjaka Dalmacije. II. Dio Dvozivci, Gmazovi, i 
Ribe. 3 e Aggiunte ai Vertebrati. Split [Spalato] : 1886. 
Birds, pp. 21-23, 7 additional species. 
Lancaster, I. The Mechanics of Soaring. Am. Nat. 1886, pp. 326-333. 
[ Cf. Zool. Rec. xxii, Aves , p, 19.] 
. Gravitation and the Soaring of Birds. T. c. pp. 514-521. [Cf 
Hendricks, J. E.] 
The author states that a Bird soars without muscular effort, because it 
throws itself over at such an angle that the resolved part of the force of 
gravity which acts at right-angles to its plane produces motion in an 
upward direction when taken in connection with the compression of the 
air. 
Landois, H. Westfalens Thierleben. Die Vogel in Wort und Bild. 
Paderborn und Munster : 1886, 364 pp., 37 pis. and cuts. 
Apterismus bei Vogeln. J.B. westf. Ver. 1885, p. 18. 
The subjects are chickens. 
— . Uber einen merkwiirdigen Einschluss in einem Huhner-Ei. 
T. c. p. 37. 
A curious brown body (27x21 X 14 mm.) found in an egg. 
Langdon, F. W. On the Destruction of Native Birds. J. Cincinn. 
Soc. 1886, ix, pp. 181 & 220. 
Langille, J. Id. Nidifieation of Birds [Coots, Rails, Ducks, Bittern, 
&c.] on the St. Clair Flats. Bull. Buff. Soc. Nat. Sci. v, pp* 
33-39. 
Laulanie, M. F. Sur le mode devolution et la valeur de repithelium 
germinatif dans le testicule embryonnaire du poulet. Bull. Soc. 
Toulouse, 1886, pp. 13-16. 
• An entirely new view of the relation between the elements of the 
testicle, on the one hand, and the epithelium and Wolffian body, on the 
other ; very significant as regards hermaphroditism. Other points of 
importance are mentioned, which cannot be easily abbreviated. 
Lawrence, G. N. List of a Few Species of Birds new to tho Fauna of 
Guadeloupe, West Indies, with a Description of a New Species of 
Ceryle. P. U. S. Nat. Mus. 1885, pp. 621-625. 
[See Ceryle stictipennis ( Alccdinidce ), n. sp.] 
— — . Characters of Two Supposed New Species of Birds from Yucatan. 
Ann. N. York Ac. iii, pp. 273 & 274. 
