PACHYPTERIS. 169 



Sagenopteris Goeppertiana figured by Zigno. 1 The midrib is well 

 marked in the lower part of the leaf, but it gradually dies out 

 towards the distal end of the lamina. Cf. also Nathorst's figures 

 of S. rhoifolia from Sweden. 2 



Other specimens : 10,378. Portions of three leaflets broader 

 than 39,222 (Text-fig. 24), but narrower than 39,221 (Lindley & 

 Button, pi. Ixiii. fig. 1), 40,468, 40,469, 40,558. 



FIG. 26. Sagenopteris Phillipsi, var. major. From a specimen in the 

 Scarborough Museum. (Nat. size.) 



Genus PACHYPTERIS, Brongniart. 

 [Prodrome, p. 49, and Histoire, p. 166, 1828.] 



Brongniart instituted this genus in 1828, defining it as follows: 

 "Foliae pinnatae vel bipinnatoe, pinnulis integris coriaceis enerviis 



1 Zigno (56), pis. xxi. and xxii. 



2 Nathorst (78*), pi. iv. fig. 2. 



