Fossil plants, Vol. 1: [A text-book] for students of botany and geology

by A. C. Seward

[865] Dawson (66), p. 153, Pl. XII.

[866] For reference vide an excellent monograph by Coemans and Kickx (64), also Potonié (94).

[867] e.g. Newberry (91).

[868] Renault (73), (76²), (96).

[869] Williamson (74), (78).

[870] Williamson and Scott (94), p. 919.

[871] Specimen 929 in the Williamson Cabinet is a longitudinal section of the French Sphenophyllum, as described by Renault (76²).

[872] Williamson and Scott (94), p. 926.

[873] Williamson (91), p. 18.

[874] Williamson and Scott (94), p. 920.