XL] 



GINKGOITES 



25 



G.flabellata, also the similar leaves figured by Krasser as G. Schmidt- 

 iana var. parvifolia], Turkestan 1 , and Western America 2 ; also from 

 Upper Jurassic beds in Japan 3 and Franz Josef Land 4 and from 



A B 



Fio. 641. A. Cinkf/oiles sibirica. B. Ba iera Brauniana ; from Upper Jurassic 

 (Kimeridgian) bods on the coast of Sutherland. 



1! 



; 



Lower Cretaceous beds in Canada 5 . A similar form of Ginkgoites 

 is recorded from Jurassic rocks in Victoria 6 . 



It should be added that some Jurassic specimens described as 

 pecies of Baiera, e.g. Baiera Phillipsi 1 Nath. are very near to 

 G. sibirica and in such cases the choice of Baiera or Ginkgoites 

 is not determined by any satisfactory standard. 



[Ginkgo digilata (Brongn.), Schmalhausen (79) A. p. 33, PL v. fig. 4 b. 

 Gingko sibirica Heer?, Ibid. p. 34, PI. iv. fig. 2 6.] 



The incomplete leaf-fragments from the Altai mountains re- 

 ferred by Schmalhausen to these species are too incomplete to be 

 determined with any degree of certainty. The precise age of the 

 beds is uncertain but, as Zeiller 8 has shown, they are probably 

 Permian. There is a certain resemblance between the specimen 

 referred to Ginkgo digitata and some leaves from Permo-Carboni- 

 ferous strata in Kashmir described as Psygmophyllum Hollandi 9 . 



1 Seward (07 2 ) PL vn. 2 Fontaine in Ward (05) B. PI. xxxm. 



3 Geyler (77) B. PI. xxxi. fig. 6; Yokoyama (89) B. PI. xiv. 



4 Newton and Teall (97) PL xxxvm. ; Nathorst (99). 



5 Dawson (85) PL n. Seward (04 2 ) B. p. 177. 



7 Seward (00) B. p 270. 



8 Zeiller (96) A. 9 Seward (07) p. 59, PL xra. figs. 36. 



