TITLES. 
Gen. Sub. 7 
46. [Belgica. Expedition anbirctique Beige. Resultats etc.] 
. Several parts of Zoology have been published and are noticed in the 
special Records. Vols. vi-ix are to be devoted to Zoology and 
Botany. 
47. *Benda, C. Das Problem der geschlechtsbestimmenden Ursachen. 
Deutsche med. Wochenschr. 1903, No. 39. 
Summary, Zool. Zentrlbl. xi, p. 163. 
48. Benham, W. B. The geographical distribution of earthworms and 
the paloeogeography of the Antarctic region. Presidential address. 
Rep. Australas. Ass. 1902, pp. 319-343. 
49. *Berdrow, H. Illustriertes Jahrb. der Naturkunde. i. Jahrg. das 
Jahr 1903, Leipzig. [From Zool. Anz. Bibl. xxvi, p. 512.] 
50. Berg, W. Beitrage zur Theorie der Fixation mit besonderer Beriick- 
sichtigung des Zellkerns und seiner Eiweisskorper. Arch. mikr. Anat. 
lxii, pp. 367-430. 
51. Bernard, H. M. Studies in the retina. Part vi. The continuity of 
the nerves through the vertebrate retina. Quart. J. Micr. Sci. xlvii, 
pp. 303-362, pis. xxvii-xxix. 
52. Berndt, W. Zur Biologie und Anatomie von Alcippe lampas Hancock. 
Zeitschr. wiss. Zool. lxxiv, pp. 396-457, pis. xix-xxii. 
53. Bethe, A. Allgemeine Anatomie und Physiologie des Nervensy stems. 
Leipsig, 1903, pp. viii 4-488, 2 pis., 95 illustr. 
Review, Anat. Anz. xxiv, p. 128. 
54. Biedermann, W. Geformte Sekrete. Zeitschr. allg. Physiol, ii, 
pp. 395-481, pis. iii-vi. 
Consists of a discussion of the histology of the chitinous skeleton of 
Coleoptera, and of a consideration as to the nature of cell-membranes 
in general. 
55. Bigelow, R. P. & Rathbun, Eleanor P. The variations of some 
acquired characters. Science xvii, p. 495. 
56. Blackman, M. W. The Spermatogenesis of the Myriapods. II. On 
the chromatin in the spermatocytes of Scolopendra heros. Biol. 
Bull, v, pp. 187-217. 
57. BlanchArd, N. On inheritance (grandparent and offspring) in 
thoroughbred racehorses. Biometrika ii, pp. 229-234. 
58. Blanchard, R. Qui a vu le premier l’hematozoaire du paludisme ? 
Arch, parasit. vii, pp. 152-158. 
Blomefield, Leonard. [See Darwin, Francis (172).] 
59. Boas, J. E. V. Carl Gegenbaur. Ov. Danske Selsk. 1903, pp. 605-615. 
60. Bohn, G. Des m4canismes respiratoires chez les Crustacds Ddcapodes. 
Bull. Sci. France Belgique xxxvi, pp. 178-551. 
61. *Bois-Reymond, Emil du. Uber die Grenzen des Naturerkennens... 
Die sieben Weltrathsel. 2 Vortrage. Leipzig, 1903, 8vo, 120 pp. 
62. Bolton, Gambier. A book of beasts and birds, with photographs 
from life. London, 1903, 8vo, xi4-132 pp., 69 pis. 
63. Bongardt, J. Beitrage zur Kenntnis der Leuchtorgane ein heim- 
ischer Lampyriden. Zeitschr. wiss. Zool. lxxv, pp. 1-45, pis. 1-3. 
[Coleoptera.] 
Abstract by Escherich, Zool. Zentrlbl. xi, pp. 136-139. 
