titles. Gen. Sub. 29 
484. [Monaco, Prince de.] Considerations sur la Biologie marine. T. c. 
No. 56, 1905, 14 pp. 
485. Montgomery, T. H. The spermatogenesis of Syrbula and Lycosa , 
with general considerations upon chromosome reduction and the 
heterochromosomes. P. Ac. Philad. lvii, pp. 162-205, pis. ix, x. 
Abstract by Goldschmidt, Zool. Zentrlbl. 1905, p. 575. 
486. Monti, R. Un modo di migrazione del Plancton fin qui sconosciuto. 
Rend. 1st. Lombardo (2) xxxviii, pp. 122-132. 
Abstract, Zool. Zentrlbl. xiii, p. 232. 
486a. . Physiobiologische Beobachtungen an den Alpenseen zwischen 
dem Vigezzo- und dem Onsernonetal (1904). Forschber. Plon xii, 
pp. 63-89. 
Abstract, Zool. Zentrlbl. 1906, p. 621. 
487. Moore, B., Roaf, H. E. & Whitley, E. On the effects of alkalies 
and acids, and of alkaline and acid salts, upon growth and cell division 
in the fertilized eggs of Echinus esculentus. A study in relationship 
to the causation of malignant disease. P. R. Soc. London lxxvii* 
pp. 102-136. 
488. Moore, J. E. S. & Robinson, L. E. Ou the behaviour of the 
nucleolus in the spermatogenesis of Periplaneta americana. Quart. 
J. Micr. Sci. xlviii, pp. 571-583, pis. xliv, xlv. 
. [See also Farmer & Moore (212, 213).] 
489. Morgan, Lilian V. Incomplete anterior regeneration in the absence 
of the brain in Leptoplana littomlis. Biol. Bull, ix, pp. 187-193, 
2 text-figg. 
490. Morgan, T. H. The assumed purity of the germ cells in Mendelian 
results. Science xxii, pp. 877-879. 
491. . The origin of species through selection contrasted with their 
origin through the appearance of definite variations. Pop. Sci. Month, 
lxvii, pp. 54-65. 
492. . An alternative interpretation of the origin of gynandro- 
morphous insects. Science xxi, pp. 632-634. 
493. . Ziegler’s theory of sex determination, and an alternative point 
of view. Op. cit. xxii, pp. 829-841. 
494. . The relation between normal and abnormal development of 
the embryo of the frog. v. As determined by the removal of the 
upper blastomeres of the frog’s egg. Arch. Entwickmech. xix, pp. 58- 
78, pis. iv, v. 
495. •. The relation between normal and abnormal development of 
the embryo of the frog. vi. As determined by incomplete injury to 
one of the first two blastomeres. T. c. pp. 318-347, pis. xvii, xviii, 
7 text-figg. 
496. . The relation between normal and abnormal development of 
the embryo of the frog. vii. As determined by injury to trie top of 
the egg in the two- and four-cell stages. T. c. pp. 566-570, pis. xix, xx. 
497. . The relation between normal and abnormal development of 
the embryo of the frog. viii. As determined by injuries caused by 
a low temperature. T. c. pp. 570-580, 9 text-figg., pis. xxi, xxii. 
498. . The relation between normal and abnormal development of 
the embryo of the frog. ix. As determined by insufficient aeration. 
T. c. pp. 581-587, 18 text-figg. 
