120 Proceedings of the Royal Physical Society. 



ment la meme pour toutes, et chez lesquelles de faibles dif- 

 ferences suffisaient pour motiver des distinctions specifiques " 

 {loc. cit., p. 96). The close resemblance of the plant to the 

 Corallian species of France will be noticed in connection 

 with the position assigned to the Eathie rocks in the memoir 

 already cited. 



Genus Podozamites — Ft. Braun emend. 

 Podozamites Milleri, sp. nov. 



"Zamia," Hugh Miller, Test, of the Rocks, p. 479, fig. 137. 



Foliis rachi validmscula, pinnis approximatis, regularihus, erecto-patentihus, 

 centim. 7-8 longis, millim. 7-9 supra basin latis, Imeari-lanceolatis, acumiiiatis, 

 basi subitofere margine superiore defiexo in pedicellum brevem 



The specimen now to be described is from the Oolite of 

 Helmsdale. It is stated by the author very closely to re- 

 semble Lindley and Button's Zamia lanceolata (P. lanceolatus 

 var. genuinus), but that the leaflets " contract much more 

 suddenly from their greatest breadth than those of lanceolata 

 into a pseudo-footstalk ; and the contraction takes place, not 

 almost equally on both sides, as in that species, but almost 

 exclusively on the upper side." To this must be added the 

 greater uniformity in size, shape, and arrangement of the 

 leaflets, which, as will be seen from the figure, pass obliquely 

 outwards in a very regular manner. Their size and outline, 

 excepting so far as the base is different, are very much those 

 of the typical (English) form of P. lanceolatus, but the loose 

 and irregular appearance of the latter, with its slender rachis, 

 gives it a distinct character, which belongs also more or less 

 to all the varieties of the species. The Helmsdale leaf seems 

 to be one of more rigid habit. The length of the portion 

 seen is 8 inches ; its rachis is comparatively strong ; and the 

 leaflets, 3 inches in length and oblique in direction, are 

 nearly straight, and almost contiguous to one another. The 

 pedicels also are strong, and probably somewhat decurrent 

 on the rachis. The manner in which they are formed, as 

 shown in the drawing and described above, is seen in so 

 many places that the appearance can hardly be accidental. 

 The greatest width of the leaflet is at half an inch or less 



