390 Cf. Protoplasmamechanik, p. 229: ãInsofern liegen also die VerhûÊltnisse hier wesentlich anders als bei der Zertheilung hohler KûÑrperformen durch flû¥ssige Lamellen. Wenn die Membran bei der Zelltheilung die von dem Prinzip der kleinsten FlûÊchen geforderte Lage und Krû¥mmung annimmt, so werden wir den Grund dafû¥r in andrer Weise abzuleiten haben.ã
391 There is, I think, some ambiguity or disagreement among botanists as to the use of this latter term: the sense in which I am using it, viz. for any partition which meets the outer or peripheral wall at right angles (the strictly radial partition being for the present excluded), is, however, clear.
392 Cit. Plateau, Statique des Liquides, i, p. 358.
393 Even in a Protozoon (Euglena viridis), when kept alive under artificial compression, Ryder found a process of cell-division to occur which he compares to the segmenting blastoderm of a fishãs egg, and which corresponds in its essential features with that here described. Contrib. Zool. Lab. Univ. Pennsylvania, I, pp. 37ã50, 1893.