MESOZOIC PLANTS FROM CHIXA. 27 



ill tlie province of Shaii-tung is liero re}) relented by several well 

 preserved specimens which however belong to sterile pinna?. 



An example represented in fig. 2 l)elongs to the apical portion 

 uf a primary })iiHia. The secondary pinna) are alternate, elonga- 

 ted, springing from the rachis at a wide angle, and sei)arated 

 from one another by an interspace which is generally narrower 

 than the breadth of the pinnie. The pinnules are more or less 

 rhomboidal in general outline and possess a few rounded lobes, 

 while the lowest of them, especially the one on the posterior 

 side, show lobes which are spreading and irregular, a character 

 already noticed by Seward in his British specimens. 



Fig. T) represents a pinna with more laciniated pinnules, 

 while in the specimen shown in fig. 4, the pinnules are small 

 and entire, showing only here and there slight traces of lobation. 



As already stated, the variability in the form of the ])innules 

 of this species has been amply proved by Öewaed in the work 

 above cited. 



2. GINKGO FLABELLATA Heii:. 



PI. yii. Figs. 0-11. 



Ginbjo flahcllala Heeu. lieitr. z. JuraHura Ostt-ih. u. d. Aiiuirl,, J 876, p. 

 (iO, pi. VII, fig. 10, XIII, 3, 4. Nachtrag, p. KJ, pi. IV, tig. 7a. 



Heer's description of this species is as follows ; 



" Leaves small, kidney-shaped, deeply lobed, lobes 8 to 14, 

 oblong, obtuse at apex ; veins longitudinal, 3 to ") in number ; 

 petiole slender, elongated." 



We have several fragments of leaves of a (rlnTc(jo which we 

 identify with the above named species of Heer, although some 

 look much like lliuse al.-^u descrilx'd liy IIeek as Gnikyo pu^illa. 



