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

by A. C. Seward

[185] Nicholson and Etheridge (80) p. 28, Pl. IX. fig. 24.

[186] Wethered (93) p. 237.

[187] For figures of the sheaths of Cyanophyceous algae, see Murray (95²), Pl. XIX. fig. 5. Gomont (88) and (92); etc.

[188] Brown (94) p. 203.

[189] For references to the papers of Wethered and others, see Seward (94), p. 24.

[190] E. G. Bornemann (87), Pl. II.

[191] Moseley, H. N. (75), p. 321.

[192] Weed (87–88), vide also Tilden (97).

[193] Bornet and Flahault (89²) Pl. XI.

[194] Batters (92).