Gji the Geologii of Catch. 



[Oct, 



Plants from the Sandstone and Clay, with beds of coal : pp. 312, 317. 

 Described hy Mr. J. Morris.* 



Ptilophyllura. 



Stem—? Fronds pinnate ; pinnee closely approximated, linear, lan- 

 ceolate, more or less elongafe, imbricate at the base, attached obliquely ; 

 base semicircular or rounded ; veins equal, slender, parallel. 



We have ventured to form these fossils into a distinct genus, conceiv- 

 ing that the circumstances of the oblique insertion of the pinna? and their 

 overlapping each other at the base, are characters too important to 

 admit of their being united to the genus Zamites, to which somewhat 

 similar fossils have hitherto been referred ; the Z. pectinata of the Fossil 

 Flora belongs to this genus, and a careful revision of the fossil Cycadece 

 may probably discover other species having this mode of attachment ; 

 from the structure of the frond they may, however, be considered to 

 belong to Cycadece^ and to differ from Zamites in the oblique insertion 

 of the pinnae at the base, and from Coniferce by the absence of a primary 

 vein in the pinnse. 



Ptllophyllum acutlfoUum. 



Frond pinnate ; pinnae narrow, linear-elongate, acute at the apex. 



This species differs from the Z. pectinata of the Fossil Flora, in its 

 pinnse being narrower, longer, and more acute; and more nearly resem- 

 bles the Polypodites pecteni/ormis of Stevx^her^. 



P. Cutchense. 



Frond pinnate ; pinnse short, scarcely overlapping at the base, apex 

 obtuse. 



This specimen has been also referred to the genus from its pinnse 

 (although wider apart than in the other species) having apparently a 

 rounded base ; but the absence of all trace of venation in this fossil 

 must render its correct determination very doubtful. It resembles in 

 form the Z. Bucklandii of Sternberg, parts 5 and 6, t. 23, f 2, or even 

 Z. taxina of the Fossil Flora ; and it might also be compared to some 

 pinnatifid Polypodiums, as P. plumula and P. taxifolium. 



It is much to be regretted, that more numerous and better-preserved 

 portions of these specimens have not been obtained, so as to compare 

 them more rigidly with the already known forms of fossil vegetation ; 

 for it is remarkable the analogy that some of them present to the StoneS' 

 field slate plants. 



Lycopodites affinis. 



* The plants are stated in p. 314 to consist of ferns and reeds, but when the Memoir 

 was passed through the press the specimens had not been examined by Mr. Morris. 



