[353] L. Errera, Sur une condition fondamentale d’équilibre des cellules vivantes, C. R., CIII, p. 822, 1886; Bull. Soc. Belge de Microscopie, XIII, Oct. 1886; Recueil d’œuvres (Physiologie générale), 1910, pp. 201–205.
[354] L. Chabry, Embryologie des Ascidiens, J. Anat. et Physiol. XXIII, p. 266, 1887.
[355] Robert, Embryologie des Troques, Arch. de Zool. exp. et gén. (3), X, 1892.
[356] “Dass der Furchungsmodus etwas für das Zukünftige unwesentliches ist,” 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 l’attache des cloisons cellulaires, Mém. Couronn. de l’Acad. R. de Belgique, LIII, 84 pp., 1893–4.
[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, Dév. des Troques, Arch. de Zool. Exp. et Gén. (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: “Das so oft sehematisch gezeichnete Vierzellenstadium mit zwei sich in zwei Punkten scheidende Medianen kann man wohl getrost aus der Reihe des Existierenden streichen,” 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 dell’ occhio e della mente, nell’ Osservatione delle Chiocciole, Roma, 1681.