GINKGO. 259 



10,316. PI. IX. Pig. 9. 



A smaller example, similar to that of Fig. 1 ; 3-7 cm. in breadth 

 :and 2'8 cm. deep. Venation clearly shown. 



Upper Shale, Scarborough. Mantell Coll: 



Ginkgo digitata, forma Muttoni. 



V. 3578. PI. IX. Fig. 2. 



This represents a more deeply lobed type, similar to the leaf 

 figured by Lindley & Hutton as Cyelopteris digitata, but afterwards 

 3)laced by Sternberg and others in a distinct species — C. Huttoni. 

 If this form of leaf be compared with the more deeply dissected 

 leaves of G. hiloia, as for example the recent leaf figured by 

 Lindley & Hutton in their plate xxvii. and those figured by 

 Saporta and Gardner in their respective works, it will be seen 

 that the more deeply divided lamina is in itself no sufficient 

 reason for a separate specific designation. This type of leaf is 

 Tepresented by some examples approaching closely the form shown 

 in Fig. 4, PI. IX., which is referred to Baiera Phillipsi, Nathorst. 

 -Labelled by Bean Cyelopteris digitata. 



Upper Shale, Scarborough. 



V. 3580. PL IX. Fig. 10. 



Another deeply lobed form, which can be matched exactly with 

 some of the smaller leaves of the recent species. The lamina is 

 3 cm. broad and 2"7 cm. deep. This leaf occurs with several others 

 on a large piece of rock ; most of them exhibit a similarly lobed 

 lamina, but others approach closely Baiera Phillipsi (PI. IX. Fig. 4). 



Other specimens: — 13,503 (broad segments), 24,755, 39,215, 

 -40,468, G. digitata (forma Huttoni), V. 3300 (similar to V. 3580, 

 Fig. 10, PI. IX.), V. 3579 (portions of several leaves), 11,019, 

 39,212, 40,546. 



Ginkgo digitata (fiowers). Text-fig. 45. 



Although we cannot speak with certainty as to the connection of 

 -any fossil fiowers with this species, it is very probable that some 

 imperfect examples of male fiowers and isolated pollen-sacs met 

 with in the English rocks may, as Nathorst first suggested, be 

 presumably regarded as the flowers of this species. 



