XL] 



GINKGOITES 



25 



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

 iana var. parvifolia), Turkestan^, and Western America^ ; also from 

 Upper Jurassic beds in Japan^ and Franz Josef Land* and from 



A B 



Fig. 641. A. Oinkgoilea sibirica. B. Baiera Brauniana; from Upper Jurassic 

 (Kimeridgian) beds on the coast of Sutherland. 



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

 is recorded from Jurassic rocks in Victoria*. 



It should be added that some Jurassic specimens described as 

 species of Baiera, e.g. Baiera Phillipsi'^ 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 digitata (Brongn.), Schmalhausen (79) A. p. 33, PI. v. fig. 4 h. 

 Gingko sibirica Heer?, Ihid. p. 34, PI. iv. fig. 2 &.] 



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^ has shown, they are probably 

 Permian. There is a certain resemblance between the specimen 

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

 ferous strata in Kashmir described as Psggmophyllum Hollandi^. 



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



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



* Newton and Teall (97) PI. xxxvni.; Nathorst (99). 



5 Dawson (85) PI. n. » Seward (04^) B. p. 177. 



' Seward (00) B. p. 270. 



« ZeUler (96) A. " Seward (07) p. 59, PI. xra. figs. 3—6. 



