^{page 356 note *} While this preliminary statement was in preparation, a paper by Miss M. G. Sykes has appeared which deals with the subject (“Notes on the Morphology of the Sporangium-bearing Organs of the Lycopodiaceæ,” New Phytologist, vol. vii. p. 41). In this the cones of a number of species of Lycopodium, including L. cernuum, are described, and the distal position of the sporangium, the presence of lignined tissue in the sporangial stalk, and other points of interest are recorded for the first time. Miss Sykes suggests the derivation of such a plant as L. cernuum from Lepidodendron or one of its allies, with Spencerites as an ancient connecting link. The genus Lycopodium is regarded as exhibiting a reduction series, and the sporophyll in L. cernuum (from which that of L. inundatnm is derived by reduction) as an axial structure, terminated by a single sporangium and bearing a single leaf. It will be evident from the following description that I have been unable to accept as adequate the account of the morphology of the cone of L. cernuum given by Miss Sykes. Further, while recognising an affinity between Spencerites and Lycopodium, I do not see sufficient ground for the interpretation of the morphology of the cone adopted by this author, nor for necessarily regarding the genus Lycopodium as a reduction series.

^{page 357 note *} Theil i., Abth. iv., p. 603, fig. 379.

^{page 356 note †} The extension of the mucilaginous change to the surface is shown in Pl. xix., fig. 13, of Mr T. G. Hill's paper in the Annals of Botany, vol. xx., but is not commented on.

^{page 358 note *} Miss Sykes suggests (loc. cit., p. 49) that these cells play a part in bending back the lamina to allow of spore dispersal.

^{page 358 note †} This feature was first recognised by Miss Sykes, and is figured by her for L. cernuum (loc. cit., Pl. iii., fig. 8). Similar lignined cells in this position are recorded for L. inundatum and L. carolinianum, and slight indications of lignification were found in the stalks of some other species. The significance of this feature is at present obscure.

^{page 359 note *} Loc. cit., fig. 379, E.

^{page 363 note *} The relations between the sporophyll-bases and the sporangia in L. inundatum were described and figured by Glück (Flora, 80, 1895, p. 359. Pl. v. figs. 1–3), whose account I can confirm. The sporophyll does not possess the peltate form shown in Miss Sykes' figure (loc. cit., text-fig. 5). This invalidates the argument advanced on p. 54 of her paper in favour of the L. inundatum type of cone being reduced from that of L. cernuum.

^{page 363 note †} “Organisation of the Fossil Plants of the Coal Measures,” Phil. Trans., Part ix., 1878; Part x., 1880; Part xvi., 1889; Part xix., 1893.

^{page 363 note ‡} Phil. Trans., vol. 189 (1897), Ser. B, p. 83; Progress. Rei. Botaniæ, Bd. I., p. 170.

^{page 363 note §} Annals of Botany, vol. xix. (1905), p. 273.

^{page 364 note *} “Organisation,” Phil. Trans.,Part ix., 1878, p. 341.

^{page 365 note *} Phil. Trans, B. 189, p. 94.

^{page 365 note †} An example of this is seen in a figure in Dr Scott's paper (Phil. Trans., B. 189, PI, xiv. fig. 13), which comes from this side of the section; the sporophyll-base here belongs to the whorl vertically above that to which the sporangium and its insertion belong.