Fossil plants, Vol. 2: A text-book for students of botany and geology

by A. C. Seward

[272] Seward (99) p. 144.

[273] Steinberg (26) A.

[274] Goeppert (52) A. p. 196. See also Kidston (01) p. 50.

[275] ibid. (52) A. p. 44. Pls. XXX. XXXI. Lief. i and ii.

[276] Balfour (72) A.

[277] Good examples are given by Schmalhausen (77) Pl. III.

[278] Steinhauer (18) A. Pl. IV. fig. 5.

[279] Brongniart (49) A. p. 42.

[280] Goldenberg (55).

[281] Carruthers (73²) p. 6.