196 
Records of the Geological Survey of India. 
[vol. x. 
Fig. 3—Is the sixth and seventh segment together, twice enlarged, showing lateral 
tubercular impression (1. t. i.), segmental portion (s. p.), and the dotted spaces 
of the seventh segment. 
Notes on Fossil Floras in India, by Ottokar Feistmantel, M.D., Palaeontologist, 
Geological Survey of India. 
XVII.—Some elements of the Artie and Siberian Jurassic Flora amongst the plants 
of the Gondwana-system. 
1. Gingko. Lin. (Fleer). 
Prof. Heer, the illustrious describer of the Artie Fossil Flora, has, in his recent pub¬ 
lications, disclosed to our knowledge the Jurassic Floras of Spitzbergen (Cape Boheman) and 
of Eastern Siberia and the Amur countries. A most interesting fact is, I think, the 
establishment of the genus Gingko (Salisburia) among the Jurassic plant remains—-a genus 
which is at present living in Japan and China. Species of this genus are described from 
Siberia and Spitzbergen. 
Some forms of this genus were at first desciibed from the Yorkshire Oolite as Cyclo- 
pteris, Bgt., Cyclopteris digitata being best known. Later, the name Bajera was 
established for these forms by Fr. Braun. Prof. Heer was so fortunate as to receive 
more complete specimens, from which he proved them to belong to the genus Gingko. The 
fossil representatives of Gingko in the Jurassic formation at present known are— 
(1) Spitzbergen—Cape Boheman.* * * § 
Gingko digitata, Heer, with varieties. 
Gingko Ruttoni, H. 
Gingko integnusciila, H. 
(2) England—Scarborough: f 
Gingko digitata, H. ( Cyclopteris digitata, Bgt.). 
Gingko Ruttoni, II. (Cyclopteris Ruttoni, Stbg.). 
(3) South-Eastern Russia—Kamenka, near Izoum: J 
Cyclopteris incisa, Eichw.—Closely related with Gingko Ruttoni, II. 
Gingko digitata, H. (as Cyclopteris). 
(4) East Siberia (Irkutsk) and Amur countries: § 
Gingko Ruttoni, H. (E. Sib.). 
Gingko Schmidtiana, H. (E. Sib.). 
Gingko flabellata, H. (E. Sib.; Amur c.). 
Gingkopusilla, H. (E. Sib.; Amur c.). 
Gingko Sibirica, II. (E. Sib.; Amur c.). 
Gingko lepida, H. (E. Sib.). 
Gingko concvnna, (E. Sib.). 
Forms of this genus were previously also described from Cretaceous and Miocene 
(Greenland, Senegaglia, N.-W. America, &e.). 
* Heer, Flora fossilis arctica, Vol. IV. 
f Brongniart, Hist. veg6t. foss., tab. 61. f. 2. 3 ; Bindley and Hutton, Foss. Flora of Gr. Brit., tab. 64. 
t Eicbwald, Lethaea Eossica, Vol. II. 
§ Heer, Flora fossilis arctica, Vol. IV. 
