48 



GINKGOALES 



re. 



in China but the photographic reproduction is unfortunately too 

 obscure to afford any indication as to the nature of the specimen. 



Baiera Phillipsi Nathorst. 



This Jurassic species 1 (fig. 652) illustrates the absence of any 

 definite dividing line between Baeira and Ginkgoites ', it agrees 

 very closely with G. sibirica and 

 with leaves assigned to G. lepida 

 and other 'species.' Fig. 652 is 

 drawn from Phillips' type- speci- 

 men 2 which he named Sphenopteris 

 longifolia and afterwards trans- 

 ferred to Cyclopteris ; his specific 

 name is not retained because Pomel 

 adopted it for a type subsequently 

 called by Heer Baiera longifolia*. 

 Krasser records B. Phillipsi from 

 Jurassic strata in Sardinia 4 . This 

 species shades into B. gracilis and 

 the very similar B. australis McCoy, 

 especially resembling some leaves 

 included by Halle 5 in the latter 

 species. 



Baiera Lindleyana (Schimper). 



Leaves of this type were first figured by Lindley and Button 6 

 as Solenites ? furcata and transferred by Braun to Baiera. 

 Schimper 7 subsequently substituted Jeanpaulia and proposed the 

 specific name Lindleyana on the ground that Heer had employed 

 the designation furcata for a Rhaetic species of Baiera. Saporta 

 included this species in Trichopitys. Baiera Lindleyana is 

 characterised by the deep dissection of the lamina into very 

 narrow, filiform, segments and by the presence of a long and 

 slender petiole (fig. 653). Some forms of this type with rather 

 broader segments are hardly distinguishable from Baiera gracilis. 



FIG 652. Baiera Phillipsi. (York 

 Museum; nat. size.) M.S. 





1 Nathorst (80) A. p. 76. 

 3 Seward (00) B. p. 270. 



5 Halle (13) Pis iv., v. 



6 Lindley and Hutton (37) A. PL 209. 



2 Phillips (75) A. PL vn. fig. 17. 

 4 Krasser (13) p. 5. 



7 Schimper (69) A. p. 683. 



