[242] Renault (96) A. Pls. XXXIII. XXXIV. p. 178. For a good section of another Lepidodendron leaf, see Scott (08) p. 160, figs. 64, 65.
[243] Weiss, F. E. (07).
[244] For a fuller account of the parichnos, see Hill, T. G. (06) and other papers quoted by F. E. Weiss (07).
[245] Barrois (04). See also Etheridge (80); Geikie (03) p. 1049.
[246] Binney (48).
[247] Darwin (03) vol. II. pp. 217, 220.
[248] Solms-Laubach (92) Pl. II. figs. 2, 4.
[249] Williamson (93) p. 10.
[250] Potonié (05) Lief, iii., p. 41.
[251] Stur (75) A. Heft II. p. 277.