144 PHTLLOPTEEIS 



almost identical. A similar form of leaflet has been described by 

 Dr. H. Woodward l from Mount Adams in South Australia, but the 

 original specimen of the figure which he gives is an imperfectly 

 preserved impression on sandstone, and shows no venation except 

 an indication of a midrib ; the clearly cut and numerous lateral 

 lines of the woodcut are evidently the engraver's vein-like 

 shading. Compare also the fragments referred by Newberry to 

 the genus Chiropteris from the Kootanie beds of Montana. 2 



From such specimens as occur in the National Collection it is 

 impossible to arrive at any satisfactory conclusion as to the real 

 nature of the species. The name assigned to it is rather for 

 purposes of convenient reference than intended to convey the 

 idea of a well-defined specific type. 



V. 2816. PL IX. Fig. 6. 



A single leaflet with an apparently truncated apex, due no 

 doubt to tearing. Yeins fairly distinct as black curving lines on 

 the brown impression of the lamina. No signs of reticulation 

 noticed. Length 3 cm., somewhat ovate-lanceolate in form. On 

 the same piece of rock is a fragment of what appears to be the 

 short stalk of a leaflet. This specimen comes very near to Chiro- 

 pteris spatulata, Newb., 3 from the Kootanie group of Montana. 

 Ecclesbourne. Rufford Coll. 



V. 2344. Probably the same species, in spite of certain differences 

 in size and shape. The venation is of the same Phyllopteris 

 type ; in this specimen the apical part is preserved and shows the 

 lanceolate termination of the leaflet. Cf. Nathorst, pi. xix. fig. 2, 

 Sagenopteris undulata, Nath., Floran vid Bjuf, Haft iii. 1886. 

 Ecclesbourne. Rufford Coll. 



1 Geol. Mag. dec. iii. vol. ii. 1885, p. 289. 



2 Amer. Journ. vol. xli. 1891, pp. 198-199. 



3 Ibid. pi. xiv. figs. 1 and 2. 



