^{page 1 note 1} Die Thier- und Pflanzenreste den alter rothen Sandsteins und Bergkalks in Nowgorodschen Gouvernement,” Bull. Acad. Imp. St. Pétersburg, tome vii. p. 78.

^{page 1 note 2} Beiträge zur Geognosie und Palaeontologie Dorpats, 1835–37.

^{page 1 note 3} Poiss. Foss. du vieux Grès rouge, tab. xxxii.

^{page 2 note 1} Op. cit. tab. xxx. figs. 5, 6.

^{page 2 note 2} Op. cit. appendix, p. 152.

^{page 2 note 3} Das vollkommenste Hautskelet der bisher bekannten Thierreiche, Dorpat, 1856.

^{page 2 note 4} Quart. Journ. Geol. Soc. vol. xvi. 1859, p. 122.Google Scholar

^{page 3 note 1} Notes on the Nomenclature of the Fishes of the Old Red Sandstone, Geol. Mag. Dec. III. Vol. V. 1888, p. 508.Google Scholar

^{page 4 note 1} Dec. Geol. Survey, x. p. 30.Google Scholar

^{page 8 note 1} Dec. Geol. Survey, vol. x. p. 52,Google Scholar plate 5.

^{page 8 note 2} Catalogue British Fossils, p. 318.

^{page 8 note 3} On Plate I. in Fig. 2, for.p. e. read pt.e. In Fig. 3, for e.n. read e.o.