^{page 651 note *} Part I., Tram. Boy. Soc. Edin., vol. xlv., part iii. (No. 27), pp. 759–780, pls. i.–vi., 1907. Part II., idem, vol. xlvi., part ii. (No. 9), pp. 213–232, pls. i.–iv., 1908.

^{page 615 note †} The specimens figured came from the “grès cuivreux” of Kamskowatkinsk, government of Wjatka.

^{page 615 note ‡} The specimens figured came from the “grès cuivreux” of Bjelebei.

^{page 616 note *} Gwynne-Vaughan, D. T., “On the Real Nature of the Tracheae in the Ferns,” Ann. Bot., vol. xxiii. (No. 87), pp. 517–523, Pl. xxviii., 1908.CrossRefGoogle Scholar

^{page 654 note *} Part II, p. 225.

^{page 663 note *} A comparison that has also been made by Tansley in his lectures on the evolution of the Filicinean vascular system, New Phytologist, vol. i., p. 260, 1907.

^{page 664 note *} Gwynne-Vaughan, and Kidston, , “On the Origin of the Adaxially Curved Leaf-trace in the Filicales,” Proc. Roy. Soc. Edin., vol. xxviii., part vi. (No. 29), p. 433, 1908.CrossRefGoogle Scholar

^{page 664 note †} Since the publication of the first part of these memoirs we have been able, through the great kindness of Prof. C. Eg. Bertrand, to examine a type specimen of Grammatopteris Rigolloti. The specimen exhibited only an opaque polished surface, and accurate conclusions as to its structure were difficult to arrive at. Still, the xylem strands of the leaf-traces in the cortex were almost straight oblong bands with small elements along the margins of their extremities. So far as we could make out, the general features of this fossil prohibit the especially close affinities with the Osmundaceæ that we previously suspected.