GYMNOSPERM^. 



65 



PiNus OVATA, Lindley and Hutton, sp. Plate XIV, figs. 4 and 5. 



Zamia OVATA, Lindl. Sf Hutt. Foss. Flor., vol. iii, p. 189, pi. '226a, 1837. 

 Zamites — Morris. Ann. Nat. Hist., ser. i, vol. vii, p. 116, 1841. 

 Zamiostrobus ovatus, Ooepp. Uebersicht. d. Arbeit d. Scbles. Ges., p. 129, 1844. 

 PiNiTES — Carr. Geol. Mag., vol. iii, p. 9, pi. xx, 1866 ; and Journ. 



Bot., pi. xviii, 1867. 



Tlianet Beds, East Kent. 



The cone closely resembles P. macrocephalus, but differs in its smaller size and more 

 ovate form. The specimen is imperfect at the base, but it seems to have possessed large 

 basal scales like the last. The apophyses of the scales are more lozenge-shaped than 

 hexagonal, and longer than broad. Carruthers had before him the transverse section, PI. 

 XIV, fig. 4, which exhibits " a slender axis, the centre of which is occupied with cellular 

 tissue, and is surrounded by a cyHnder of wood. Being transverse, the section cannot 

 exhibit the disc on the vascular tissue, but it exactly agrees with transverse sections of 

 recent cones. A regular series of large ducts are arranged symmetrically around the 

 axis. Each scale supports two seeds. The tissue of these has entirely disappeared, the 

 cavity being filled with carbonate of lime. Three other scales are seen beyond that 

 bearing the seeds in section." The history of the species is similar to that of the last. 

 The seeds seem rounder, and it is possibly a distinct species, though from beds of the 

 same age. Mr. Richardson is said to have found it on the coast near Faversham. 

 Owing to some curious misunderstanding it is recorded by Schimper as from a 

 rearranged deposit near Lyme Regis, but probably of Tertiary age. 



PiNUS Prestwichii, sp. nov. Plate XIII, fig. 3. 



Abies sp., Prestwich. Quart. Journ. Geol. Society, vol. x, p. 156, pi. iii, fig. 3, 1854. 

 Thanet Beds, Heme Bay. 



The cone is elongate, ninety-four millimetres in length, cylindrical, and tapers 

 gradually from the widest part, twenty-one millimetres, to a very acute apex, and rather 

 more suddenly to a small truncated base. The scales are flattened, without any trace of 

 prominence or keels, and marked with irregular longitudinal striae, either parallel or 

 slightly diverging at the base. Their impressions are sub-hexagonal or with the upper 

 margin rounded ; the umbo must have been apical, and there are slight indications on 

 one or two scales that it may have been mucronate. Their extreme width is twelve to 



