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

by A. C. Seward

[552] White (08) p. 450, Pl. V. fig. 12.

[553] Potonié (01²).

[554] Goeppert (64) A.

[555] Goeppert, loc. cit.

[556] Gresley (89) Pl. II.

[557] Steinhauer (18) A.

[558] Logan (42).

[559] Potonié (93³).

[560] Williamson (87) A.

[561] A similar example, now in the Bergakademie of Berlin, has been described by Potonié (90) A.; see also a note on the German specimen by Seward (91).