XLIl] 



PSYGMOPHYLLTJM 



85 



dopsis ginkgoides var. Suessmilchi '; they are probably referable 

 to Psygmophyllum. 



Psygmophyllum Williamsoni Nathorst. 



A species 1 founded on imperfect leaves from the Upper Devonian 

 of Spitzbergen agreeing closely in shape and venation with P. 

 flabellatum. This is the oldest European example of the genus. 

 In answer to an enquiry with regard to the venation Prof. Nathorst 

 kindly informed me that he was unable to detect any definite 

 traces of anastomosis and that the veins agree in their spacing 

 with those of P. flabellatum. 



FIG. 667. Psygmophyllum Kidsloni. From Vereeniging. 8. Africa. 

 ( nat. size.) 



Psygmophyllum majus Arber. 



The large flabellate leaves 2 , often more than 16 cm. long and 

 15 cm. broad, representing this Lower Carboniferous or Upper 

 Devonian species from Newfoundland, are distinguished from 

 P. flabellatum by their broader and less kite-like lamina and by 

 the coarser venation. The distal margin is almost entire or 

 characterised by broad and shallow lobes: as in P. Williamsoni 

 no axis occurs with the leaves. As Arber points out, this species 



1 Nathorst (94) A. PL n. figs. 1, 2; Arber (12) PL XLII. fig. 4. 



2 Arber (12) p. 392, Pis. XLII. XLIV. 



