1104 The American Naturalist. [December, 
ANNOTATED BIBLIOGRAPHY. 
BAIRD, SPENCER F.—’50. Revision of the North American Tailed Ba- 
trachia, with Descriptions of New Genera and Species. Jour. Acad. Nat. 
Sci., 2d ser., Vol. I. (1850), p. 284. The red and the viridescent form are 
put in the same genus. 
"51. Iconographic Encyclopedia of Science, Literature, and Art. Syste- 
matically arranged by J. G. Heck. Translated from the German with 
additions and edited by Spencer F. Baird. Vol. II., Botany and Zoology, 
etc. New York, 1851. Distinguishes from European Tritons, and puts 
toth red and viridescent form in the same genus, remarking that while one 
is the most terrestrial and the other the most aquatic of all American Newts, 
they are so much alike that it difficult to distinguish them. Describes mat- 
ing and ovulation, the horny ridges on the hind legs of male. 
Batrour, F. M.—’81. A Treatise on Comparative Embryology, Vol. II. 
London, 1881. On pp. 99, 100, are notes on fertilization and ovulation. 
BATEMAN, Rev. G. C.—’go. Fresh-Water Aquaria : Construction, Arrange- 
ment, and Management. London, 1890. Pp. 98-100 describe habits, 
ovulation, etc., of English Tritons. 
BEDRIAGA, J. v.—'81. Professor Nauck’s Mittheilung über die Fortpflan- 
zung der Tritonen. Zool. Anz., Bd. IV., pp. 157-159. Describes copula- 
tion as an actual contact of the cloacæ. 
BLANCHARD, R.—’81. Sur les glandes cloacale et pelvienne et sur la 
papille cloacale des Batraciens urodeles. Zool. Anz.,Bd. IV. (1881) pp. 9, 
34. Believes that the cloacle glands of the male and female are homo- 
logous, and that it was the cloacle gland that v. Siebold described as a 
receptaculum seminis. See Jordan, ‘gt, p 
BOULANGER, G. A.—'82. Catalogue of the Batrachia Gradientia s. Cau- 
data, and Batrachia Apoda in the Collection of the British Museum. Second 
edition, London, 1882. Red and viridescent forms not distinguished as 
different species. 
Braun, Dr. M.—’78. Ueber äussere Hiilfsorgane bei der Begattung von 
Triton (Diemyctylus) viridescens. Zool. Anz., Bd. L., 1878, pp. 124-126. 
Describes the so often and previously described horny ridges on the oppos- 
ing surfaces of the hind legs of the male in the breeding season. See Baird, 
"51 ; Cope, "66, '87. 
Cope, E. D.—’s9. On the Primary Divisions of the Salamandridz, with 
Descriptions of Two New Species. Proc. Acad. Nat. Sci., Philada., Vol. II. 
(1859), pp. 122-128. Expresses the belief that the red and viridescent 
forms are states of the same species. 
Cope, E. D.—’66. On the structure and distribution of the genera of the 
Acilia Anura. Phila. Acad. Nat. Sci. Jour., Vol. VI. (1866-1869), pp. 65- 
II2 
: ‘Bs, The Retrograde M E of Siren. AMERICAN NATURA- 
LIST, Vol. XIX. (1885), pp. 1226, 1227, also p. 245. Describes atrophy a 
external gills in the young and their subsequent oT 




