[1112] Williamson (832) A, p. 478.
[1113] κοινός = Lat. communis, common or general. I am indebted to my friend Mr L. H. G. Greenwood, Fellow of Emmanuel College, for supplying me with a name to express the idea of the generalized nature of these Palaeozoic ferns.
[1114] Arber (06).
[1115] Renault (96) A. p. 46, Pls. XXX. XXXI. See also Tansley (08) fig. 2, p. 13.
[1116] Cotta (32) p. 15.
[1117] Stenzel (89) Pls. I. II.
[1118] Stopes (06).
[1119] Williamson (89) A. p. 162. The term Rachiopteris was adopted by Williamson for petrified petioles from the Coal-Measures which he believed to be filicinean.
[1120] Renault (75); (96) A. p. 47, Pl. XXXII.
[1121] Oliver (02).