vj 



ARCHAEOPTERIS 



Pteropsida. 



59 



Archaeopteris, Dawson, 1871^ (Figs. 28-32). Fronds of large 

 size, bipinnate with a stipiilar base, stipules in pairs, adnatc, and 

 a ranicntum on the lower part of the petiole. Sterile pinnules typi- 

 cally obo\'ate or ovatc-cuneate, entire ortoothed, with a flabellate 



Fig. .31 . Ardtaeopleris fissilis, Schmalli., from tlic Upper Devonian of EUes- 

 mereland. (Nat. size except fig. marked 9, which is x|.) After Nathorst 

 (1904). 



1 See Carruthers (1872); Kidston (1888); Nathorst (1902) and (1904); 

 Wliitc (190.5); Kidston (1906), p. 4.34; .Johnson (1911-). 



