XL} GINKGOITES 23 



specifically distinct from G. digitata. G. digitata is represented in 

 Upper Jurassic or Wealdeu beds in Alaska (Cape Lisburne)i. 



Other Localities. 



From Southern Russia Thomas^ has recently described good 

 specimens of Ginkgo digitata of Middle Jurassic age some of which 

 agree closely with the large leaves figured by Fontaine from Oregon 

 as G. Huitoni var. magnifolia ; the specimens previously figured by 

 Eichwald^ as Cyclopieris incisa from the same district are examples 

 of G. digitata. The species is recorded also from Jurassic rocks 

 in Turkestan* (fig. 635, F), Chinese Dzungaria^ on the west border 

 of Mongoha, from the region to the east of Lake Baikal^, and from 

 Afghanistan^. The incomplete specimen figured by FeistmanteF 

 from the Jabalpur group of India as Ginkgo lobata. part of which 

 is shown in fig. 643, A, agrees in the form of the lamina and in 

 venation with G. digitata: the veins in the middle of the lamina 

 are from -8 to 1 mm. apart. Feistmantel compares his species 

 with G. digitata, and an examination of one of his figured specimens 

 leads me to assign it to that type ; it is indistinguishable from the 

 Afghan specimen already quoted. The piece of a leaf figured by 

 Feistmantel as Ginkgo sp. belongs to a'similar leaf, but the venation 

 is finer and it may be identical with Ginkgo crassipes Feist. ^ 



Leaves of the G. digitata type are recorded from Jurassic beds 

 in Victoria" (fig. 635, D) and from Japan" (fig. 635, C). Tuzson 

 has figured a bilobed petiolate leaf from Jurassic rocks in Hungary 

 as Ginkgo parvifolia^^ ; it is similar in form to most of the specimens 

 referred to G. digitata, but has relatively broader segments: it is 

 interesting as being the first recorded example of Ginkgoites from 

 Hungary. 



' Knowlton (14) PI. xLiv. 



2 Thomas, H. H. (11) p. 73, PI. iv, fig. 7; PI. vra. fig. 2. 

 ' Eiohwald (65) PI. iv. fig. 6. * Seward (07^) PI. vii. 



5 Seward (11) PI. m. fig. 40. " Krasser (05) PI. ii. fig. 3. 



' Seward (12) PI. IV. fig. 51. 

 8 Feistmantel (77^) PI. i. fig. 1. 



" See page 28. " Seward (04^) B. fig. 35. 



" Yokoyama (88) B. PI. xiii, fig. 2. " Tuzson (14) PI. xiv. fig. 1. 



