GINKGOAL] 



[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 2 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 Raymondi Renault. 



This French, Permian (Autunien), species 3 (fig. 645, A)"diflers 

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



FIG. 645. A, Baiera Raymondi. B, Ginkgoites Geinitzi. 

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



into very regularly bifurcate narrow linear segments diverging at 

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



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



2 Zeiller (06) B. PL i. figs. 7, 8. 3 Renault (88) p. 324, fig. 48. 



