Plateau observes that a special sense of smell can only be claimed for organs which are able to detect faint and distant odours, and that experiments made with powerful odours close to the body of the Insect may lead to fallacious results. The perception of faint odours cannot be effected by the palps or cerci of the Cockroach, but only by the antennæ.
THE END.
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FOOTNOTES:
[1] Baer’s account of Döllinger is to be found in the Leben und Schriften von K. E. von Baer, § 8.
[2] Prof. Plateau’s chief communications will be found on pp. [131] and [159]; Mr. Nusbaum has furnished the account of the Development of the Cockroach, pp. [180] to 195; and Mr. Scudder the Geological History of the Cockroach, chap. xi.
[3] Correspondence of John Ray, p. [142].
[4] Copies dated 1762 have a plate representing the microscope and dissecting instruments used by the author.
[5] Dufour. Rech. anat. et phys. sur les Hémiptères (1833) les Orthoptères, les Hymenoptères et les Neuroptères (1841), et les Diptères (1851). Mém. de l’Institut, Tom. IV., VII., XI. Also many memoirs in Ann. des Sci. Nat.
[6] Newport. Art. “Insecta,” in Cycl. of Anat. and Phys. (1839), besides many special memoirs in the Phil. and Linn. Trans.