42 GINKGOALES [CH. 



resembles B. pulchella, a Jurassic species described by Heer 1 from 

 East Siberia and by Bartholin 2 from Bornholm, but in typical 

 examples of B. pulchella the lamina is divided into two segments 

 only. Comparison may be made also with B. longifolia a Jurassic 

 species distinguished by its narrower segments. A specimen from 

 Bornholm referred by Holier 3 to B. pulchella is probably, as Nathorst 

 suggests, a piece of a B. spectabilis leaf. 



Baiera Simmondsi (Shirley). 



The leaves described by Shirley 4 as Ginkgo Simmondsi from 

 Denmark Hill near Ipswich in Queensland, from rocks that are 

 probably of Rhaetic age, are of the same type as the leaf on which 

 Ratte 5 founded his species Jeanpaulia (?) palmata, which he after- 

 wards transferred to Salisburia, from the Wianammata beds (Trias) 

 near Sydney. The precise age of the rich flora from Ipswich is 

 difficult to determine : a recent examination of several specimens 

 in the Brisbane collections led me to regard the plants as Rhaetic, 

 but further light on this question will be afforded by Mr Walkom 

 who is engaged in an investigation of the material. The Australian 

 leaves agree closely with Fontaine's Triassic species, Baiera multi- 

 fida 6 , from Virginia : the plant-beds of the Richmond coalfield 

 are correlated with the Lunz plant-beds in Austria 7 , the flora of 

 which has never been adequately illustrated. The specimens from 

 Virginia on which Fontaine founded his species do not afford any 

 evidence of a true petiole and the basal portion of the cuneate 

 lamina is narrower than in the Australian leaves : it is, therefore, 

 not improbable that B. multifida is a distinct though very similar 

 species. Ratte's name B. palmata cannot be retained as Heer 

 had previously employed the same name for a Jurassic Siberian 

 form 8 : I have adopted Shirley's designation in the belief that 

 there are no differences of specific value between the Sydney and 

 Ipswich specimens. 



The leaf reproduced in fig. 648 is Ratte's type-specimen in the 

 Australian Museum, Sydney: the whole leaf is nearly 30 cm. 



1 Heer (77) ii. p. 114, PL xx. fig. 3c; PI. xxii. fig. la; PL xxvra. fig. 3. 



2 Bartholin (94) PL xi. fig. 5. 3 Moller (03) PL iv. fig. 19. 

 4 Shirley (98) p. 12, PL n. 5 Ratte (87) PL xvn; (88). 



6 Fontaine (83) B. p. 87, Pis. XLV. XLVII. 



7 Berry (12). 8 Heer (77) ii. p. 115, PL xxvm. fig. 2 



I 



