Part 18

---- on an Erect Sigillaria and a Carpolite from Nova Scotia, Quart. Journ. Geol. Soc. Lond.

---- on Calamites, Ann. Nat. Hist. 4th ser. vol. iv. 272.

---- on the Varieties and Mode of Preservation of the Fossils known as Sternbergiæ, Canadian Naturalist; also in Edin. New Phil. Journal, N.S. vii. 140.

---- Acadian Geology, 1868.

---- the Fossil Plants of the Devonian and Upper Silurian Formations of Canada, Geol. Survey of Canada, 1871.

---- on the Pre-Carboniferous Floras of North-Eastern America, with special reference to that of the Erian (Devonian) Period, Proc. Roy. Soc. Lond., May 5, 1870.

---- on the Graphite of the Laurentian Rocks of Canada, Quart. Journ. Geol. Soc., xxvi. 112.

Dunker, Zettel, and Meyer, Beiträge zur Naturgeschichte der Vorwelt.

Ettingshausen, Beiträge zur Flora der Vorwelt in Abhandlungen der Geolog. Reichsanstalt, Vienna, 1851.

Forbes, on Tertiary Leaf-Beds in the Isle of Mull, discovered by the Duke of Argyll, F.G.S., with a note on the Vegetable Remains from Ardtun Head, Quart. Journ. Geol. Soc. Lond., vol. vii.

Giebel, Palæontologie.

Goeppert, Beiträge zur Bernsteinflora; sur la Structure de la Houille.

---- Die Gattungen der Fossilen Pflanzen, Bonn, 1841.

---- Monographie des Fossilen Coniferen, 1850.

---- Systema Filicum Fossilium, Nova Acta, xvii.

---- Ueber die Fossilen Cycadeen, Breslau, 1844.

---- Erläuterung der Steinkohlen-Formation.

Goeppert, Die Fossile Flora der Permischen Formation, Palæontographica, Hermann von Meyer, Cassel, 1864.

---- Beiträge zur Kenntniss Fossilen Cycadeen, Breslau.

Grand d'Eury, on Calamites and Asterophyllites, Ann. Nat. Hist., ser. 4, vol. iv. 124.

Harkness, on Coal, Edin. Phil. Journ., July 1854.

Heer, Flora Tertiaria Helvetiæ, 3 vols.

---- Flora Fossilis Arctica, 1868-1871.

---- on the Fossil Flora of Bovey Tracey, Phil. Trans. R.S.L., 152, p. 1039.

---- on the Fossil Flora of North Greenland, Phil. Trans., vol. 159, p. 445.

Hooker, on Some Minute Seed-Vessels (Carpolithes ovulum, Brongniart) from the Eocene beds of Lewisham, Proceed. Geol. Soc., 1855.

---- Vegetation of the Carboniferous Period, in Mem. of Geol. Survey, ii.

---- on a New Species of Volkmannia, Quart. Journ. Geol. Soc. Lond., May 1854.