taeten_, 1880.

[247] _Ueber Farbenwechsel bei niederen Wirbelthieren, bedingt durch
directe Wirkung des Lichts auf die Pigmentzellen._ _Centralblatt fuer
Physiologie_, 1891, v., p. 326.

[248] _Ueber den Farbenwechsel der Froesche._ _Pflueger's Archiv fuer
Physiologie_, 1892, li., p. 455.

[249] _Lecon d'Ouverture du Cours de l'Evolution des Etres organises._
Paris, 1888, and "Les Facteurs de l'Evolution," _Revue Scientifique_,
November 23, 1889.

[250] _Revue Encyclopedique_, 1897. p. 325. Yet we have an example of
the appearance of a new organ in the case of the duckbill, in which the
horny plates take the place of the teeth which Poulton has discovered in
the embryo. Other cases are the adductor muscles of shelled crustacea.
(See p. 418.)

[251] _La Philosophie Zoologique avant Darwin_. Paris, 1884, p. 76.

[252] "Lamarckism and Darwinism." Proceedings Boston Society Natural
History, xxv., 1890, pp. 42-49.

[253] "The Origin of Species without the Aid of Natural Selection,"
_Natural Science_, Oct., 1894. Also, "The Origin of Plant Structures."

[254] "Does Natural Selection play any Part in the Origin of Species
among Plants?" _Natural Science_, Sept., 1897.

[255] "Essay on the Development Hypothesis," 1852, London _Times_.

[256] "A Theoretical Origin of Endogens from Exogens through
Self-Adaptation to an Aquatic Habit," _Linnean Society Journal_: Botany,
1892, _l. c._, xxix., pp. 485-528. A case analogous to kinetogenesis in
animals is his statement based on mathematical calculations by
Mr. Hiern, "that the best form of the margin of floating leaves for
resisting the strains due to running water is circular, or at least the
several portions of the margin would be circular arcs" (p. 517).

[257] "De l'Influence du Milieu sur la Structure anatomique des
Vegetaux," _Ann. Sci. Nat. Bot._, ser. 6, xii., 1881, p. 167.

[258] "Notes on the Regional Distribution of the Cape Flora,"
_Transactions_ Botanical Society, Edinburgh. 1891, p. 241.

[259] _Les Vegetaux et les Milieux cosmiques_, Paris, 1898, pp. 292.

[260] Proceedings Biological Society of Washington, 1890.

[261] "Phylogeny of the Pelecypoda," Memoirs Boston Society Natural
History, iv., 1890, pp. 277-400. Also, _American Naturalist_, 1891,
xxv., pp. 11-21.

[262] "Transformations of Planorbis at Steinheim, with Remarks on the
Effects of Gravity upon the Forms of Shells and Animals," Proceedings
A. A. A. S., xxix., 1880.

[263] _Der Kampf d