XL] BAIERA 33 



from the London clay of Sheppey as Salishuria eocenica and 

 afterwards figured by Gardner as Ginkgo'^ eocenica^. The 

 specimens (11 x 9 mm.) are smaller than the seeds of the recent 

 species but in shape and in the keeled shell there is a fairly close 

 resemblance. The hard sclerotesta forms the surface of the fossils. 

 Similar seeds have been assigned to Ginkgoites adiantoides from 

 the Upper Phocene of the Frankfurt district^, but neither the 

 German nor Enghsh specimens possess any interest as records of 

 Ginkgoites seeds. 



Ginkgocladus. Ettingshausen. 



An imperfect leaf-hke impression described by Ettingshausen* 

 from Eocene beds in New Zealand was made by him the type of 

 a new genus Gfinkgocladics and interpreted as a stalked phylloclade 

 similar to those of the recent Conifer Phyllodadus, but because of 

 the presence of a slender stalk and the resemblance of the lateral 

 veins to the venation of Ginkgo Ettingshausen suggested an affinity 

 to that genus. The existence of a midrib is, however, an important 

 difference. Neither the New Zealand species nor similar fragments 

 from Eocene strata in New South Wales {Ginkgocladus austra- 

 liensis^) are of value as botanical records. 



BAIERA. Braun. 



This generic name was first used by Braun^ for some Triassic 

 and Jurassic leaves agreeing in shape with those of Ginkgoites but 

 distinguished by the greater number and less breadth of the linear 

 segments. Braun's definition states that the primary veins are 

 dichotomously branched while between them secondary veins 

 form irregular hexagonal meshes. Schenk^ examined Braun's 

 Rhaetic specimens and failed to discover any indication of the 

 presence of secondary veins. In 1877 Heer' emended the original 

 definition of the genus: he refers to the presence of finer veins 

 between the main vascular strands and this feature is shown in 



1 Gardner (86) p. 46, PI. ix. figs. 31—34. 



2 Engelhardt and Kinkelin (08) p. 196, PI. xxm. figs. 16—18. 



3 Ettingshausen (87) p. 39, PI. vn. fig. 19. 



* Ihid. (88) p. 103, PI. vin. fig. 32. = Braun, C. P. W. (43) p. 20. 



* Sohenk (67) A. p. 42. Schenk includes some of Braun's species of Baiera in 

 Unger's genus JeanpauHa which has since been discarded. 



' Heer (77) ii. p. 51. 

 s. IV 3 



