297 Indeed any non-isotropic stiffness, even though T remained uniform, would simulate, and be inôÙdisôÙtinôÙguishôÙable from, a condition of non-stiffness and non-isotropic T.
298 A non-symmetry of T and Tÿ£¢ãý might also be capable of explanation as a result of ãliquid cryôÙstalôÙliôÙsaôÙtion.ã This hypothesis is referred to, in connection with the blood-corpuscles, on p. 272.
299 The case of the snow-crystals is a particularly interesting one; for their ãdistributionã is in some ways analogous to what we find, for instance, among our microscopic skeletons of Radiolarians. That is to say, we may one day meet with myriads of some one particular form or species only, and another day with myriads of another; while at another time and place we may find species intermingled in inexhaustible variety. (Cf. e.g. J. Glaisher, Ill. London News, Feb. 17, 1855; Q.J.M.S. III, pp. 179ã185, 1855).
300 Cf. Bergson, Creative Evolution, p. 107: ãCertain Foraminifera have not varied since the Silurian epoch. Unmoved witnesses of the innumerable revolutions that have upheaved our planet, the Lingulae are today what they were at the remotest times of the palaeozoic era.ã
301 Ray Lankester, A.M.N.H. (4), XI, p. 321, 1873.
302 Leidy, Parasites of the Termites, J. Nat. Sci., Philadelphia, VIII, pp. 425ã447, 1874ã81; cf. Saville Kentãs Infusoria, II, p. 551.
303 Op. cit. p. 79.
304 Brady, Challenger Monograph, pl. XX, p. 233.
305 That the Foraminifera not only can but do hang from the surface of the water is confirmed by the following apt quotation which I owe to Mr E. Heron-Allen: ãQuand on place, comme il a ûˋtûˋ dit, le dûˋpûÇt provenant du lavage des fucus dans un flacon que lãon remplit de nouvelle eau, on voit au bout dãune heure environ les animaux [Gromia dujardinii] se mettre en mouvement et commencer û grimper. Six heures aprû´s ils tapissent lãextûˋrieur du flacon, de sorte que les plus ûˋlevûˋs sont û trente-six ou quarante-deux millimetres du fond; le lendemain beaucoup dãentre eux, aprû´s avoir atteint le niveau du liquide, ont continuûˋ û ramper û sa surface, en se laissant pendre au-dessous comme certains mollusques gastûˋropodes.ã (Dujardin, F., Observations nouvelles sur les prûˋtendus cûˋphalopodes microscopiques, Ann. des Sci. Nat. (2), III, p. 312, 1835.)
306 Cf. Boas, Spolia Atlantica, 1886, pl. 6.