Do., IIe Partie. Crustacés Décapodes. Ibid., Tom. VII. (1884).
[94] Statical muscular force and Specific muscular force are synonymous terms in common use. Contractile force per unit of sectional area gives perhaps the clearest idea of what is meant.
[95] Vol. II., p. 203. The calculation here quoted is based upon an observation of Swammerdam, who relates that a Cheese-hopper, 1/4 in. long, leaped out of a box 6 in. deep.
[96] Haughton’s Animal Mechanics, 2nd ed., p. 43.
[97] In any comparison it is necessary to cite not the height cleared by the man, but the displacement during the leap of his centre of gravity.
[98] The granules are not shown in the figure, having been removed in the preparation of the tissue for microscopic examination.
[99] Balfour, Embryology, Vol. II., p. 603.
[100] Yung (“Syst. nerveux des Crustacées Décapodes, Arch. de Zool. exp. et gén.,” Tom. VII., 1878) proposes to name connectives the longitudinal bundles of nerve-fibres which unite the ganglia, and to reserve the term commissures for the transverse communicating branches.
[101] This commissure, which has been erroneously regarded as characteristic of Crustacea, was found by Lyonnet in the larva of Cossus, by Straus-Dürckheim in Locusta and Buprestis, by Blanchard in Dytiscus and Otiorhynchus, by Leydig in Glomeris and Telephorus, by Dietl in Gryllotalpa, and by Liénard in a large number of other Insects and Myriapods, including Periplaneta. See Liénard, “Const. de l’anneau œsophagien,” Bull. Acad. Boy. de Belgique, 2e Sér., Tom. XLIX., 1880.
[102] We have not been able to distinguish in the adult Cockroach the double layer of neurilemmar cells noticed by Leydig and Michels in various Coleoptera.