by Gould, Handbook of Birds of Australia, 1865, vol. ii. p. 82.]
416 (return) [ See, for instance, the account which I have given
( Descent of Man, vol. ii. p. 32) of an Anolis and Draco.]
417 (return) [ These muscles are described in his well-known works. I
am greatly indebted to this distinguished observer for having given me
in a letter information on this same subject.]
418 (return) [ Lehrbuch der Histologie des Menschen, 1857, s. 82. I
owe to Prof. W. Turner s kindness an extract from this work.]
419 (return) [ Quarterly Journal of Microscopical Science, 1853, vol.
i. p. 262.]
420 (return) [ Lehrbuch der Histologie, 1857, s. 82.]
421 (return) [ Dictionary of English Etymology, p. 403.]
422 (return) [ See the account of the habits of this animal by Dr.
Cooper, as quoted in Nature, April 27, 1871, p. 512.]
423 (return) [ Dr. Gunther, Reptiles of British India, p. 262.]
424 (return) [ Mr. J. Mansel Weale, Nature, April 27, 1871, p. 508.]
425 (return) [ Journal of Researches during the Voyage of the
Beagle, 1845, p. 96. I have compared the rattling thus produced with
that of the Rattle-snake.]
426 (return) [ See the account by Dr. Anderson, Proc. Zool. Soc. 1871,
p. 196.]
427 (return) [ The American Naturalist, Jan. 1872, p. 32. I regret
that I cannot follow Prof. Shaler in believing that the rattle has been
developed, by the aid of natural selection, for the sake of producing
sounds which deceive and attract birds, so that they may serve as prey
to the snake. I do not, however, wish to doubt that the sounds may
occasionally subserve this end. But the conclusion at which I have
arrived, viz. that the rattling serves as a warning to would-be
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