38 



GINKGOALES 



[CH. 



Schizopteris, e.g. S. Guembeli from Upper Carboniferous and Permian 

 strata 1, but other Permian specimens assigned to Schizopteris, 

 e.g. S. dichotoma and S. trichomanoides^ are generically distinct 

 and probably belong to Pteridosperms. B. virginiana and the 

 leaves referred to Baiera digitata — possibly specifically with Fon- 

 taine's type — represent Permian forms that agree closely with the 

 larger species B. Simmondsi, Heer's Keuper species B. furcata, 

 and with the larger examples of B. Muensteriana (Presl) from 

 Rhaetic beds. 

 Baiera Ray^nondi Renault. 



This French, Permian '(Autunien), species* (fig. 645, A) differs 

 but little from B. virginiana ; the narrow cuneate leaf is divided 



Fie. 645. A, Baiera Raymondi. B, Ginkgoites Oeinitzi. 

 (Nat. size; A, after Renault ; B, after Nathorst.) 



into very regularly bifurcate narrow hnear segments diverging at 

 a small angle. The largest specimen is 10-8 cm. long, the basal 



1 Weiss (69) B. PI. xn. fig. 7 ; Goeppert (64) A. PI. ix. figs. 6, 7. 



2 Zeiller (06) B. PI. i. figs. 7, 8. a Renault (88) p. 324, fig. 48. 



