356 ãDass der Furchungsmodus etwas fû¥r das Zukû¥nftige unwesentliches ist,ã Z. f. w. Z. LV, 1893, p. 37. With this statement compare, or contrast, that of Conklin, quoted on p. 4; cf. also pp. 157, 348 (footnotes).
357 de Wildeman, Etudes sur lãattache des cloisons cellulaires, Mûˋm. Couronn. de lãAcad. R. de Belgique, LIII, 84 pp., 1893ã4.
358 It was so termed by Conklin in 1897, in his paper on Crepidula (J. of Morph. XIII, 1897). It is the Querfurche of Rabl (Morph. Jahrb. V, 1879); the Polarfurche of O. Hertwig (Jen. Zeitschr. XIV, 1880); the Brechungslinie of Rauber (Neue Grundlage zur K. der Zelle, M. Jb. VIII, 1882). It is carefully discussed by Robert, Dûˋv. des Troques, Arch. de Zool. Exp. et Gûˋn. (3), X, 1892, p. 307 seq.
359 Thus Wilson (J. of Morph. VIII, 1895) declared that in Amphioxus the polar furrow was occasionally absent, and Driesch took occasion to criticise and to throw doubt upon the statement (Arch. f. Entw. Mech. I, 1895, p. 418).
360 Precisely the same remark was made long ago by Driesch: ãDas so oft sehematisch gezeichnete Vierzellenstadium mit zwei sich in zwei Punkten scheidende Medianen kann man wohl getrost aus der Reihe des Existierenden streichen,ã Entw. mech. Studien, Z. f. w. Z. LIII, p. 166, 1892. Cf. also his Math. mechanische Bedeutung morphologischer Probleme der Biologie, Jena, 59 pp. 1891.
361 Compare, however, p. 299.
362 Ricreatione dellã occhio e della mente, nellã Osservatione delle Chiocciole, Roma, 1681.
363 Cf. some of J. H. Vincentãs photographs of ripples, in Phil. Mag. 1897ã1899; or those of F. R. Watson, in Phys. Review, 1897, 1901, 1916. The appearance will depend on the rate of the wave, and in turn on the surface-tension; with a low tension one would probably see only a moving ãjabble.ã FitzGerald thought diatom-patterns might be due to electromagnetic vibrations (Works, p. 503, 1902).
364 Cushman, J. A. and Henderson, W. P., Amer. Nat. XL, pp. 797ã802, 1906.
365 This does not merely neglect the broken ones but all whose centres lie between this circle and a hexagon inscribed in it.