XXX INTRODUCTION. 



in the 'Annals of Botany' in 1891, in which he adds further 

 dotails to Carruthers' account of Bennettites Gibsonianus. He 

 mentions the occurrence of wood in nodules in the bed in 

 which it was found (1891, p. 429): "If we break up the 

 concretions we usually find afc the centre of them a fragment 

 of coniferous wood in good preservation, and sometimes covered 

 only by a thin crust of stone. . . . The material of petrifaction, 

 is calcium carbonate and tricalciura phosphate.'' 



Seward's account of the Wealden (1895) contains a short 

 reference to Bennettites Gibgoniamis : and in 1896 the " Drngon- 

 Tree " is further illustrated by the same author. 



The first of the oft-mentioned " coniferous woods " to recvivo 

 detailed treatment was Citjiressinovifloti vectense, which was 

 illustrated and described with meticulous care by Barber ( IS'.IM. 



From this date onwards nothing further was added to the 

 list of Lower Greensand plants, till Stupes in 1910 announced 

 the discovery of petrified angiospennic woods of this age. In 

 1911 also Stopes demonstrated that the " Dragon-Tree" was 

 only a badly-preserved conifer. 



In the same year Berry (1911) published his important work 

 on the Lower Cretaceous of America, in which he gives a 

 summary of the described floras from all parts of the world. 

 Under the heading " Barremian Stage " he lists the following 

 remains from the Lower Greensand and Atherftcld beds : 



" Cycadfoidta Gibsoni (Carr.), Ward. 

 Cycadeovltd inclusa (Carr.), Ward. 

 Cyeadeoidta maxima (Carr.), Soluis-Laubaih. 

 Cycadtottrvbus WaU-sri, Carruthers. 

 Drdccena Bcnstedi, Koenig. 

 M.ttonia sqwtmata, Carruthers. 

 Fucoides biyiiorieiigis, Mantell. 

 Fucoides sp. 



J'inites Bensted-t (Mantell), Endl. 

 Pinites cylindroidcfi, Gardner. 

 Plitltes Ltckcnbyi, Carruthers. 

 J'inites Matttelli, Carruthers. 

 Plitiles oblonyiis (L. & H.), Endl. 

 I'iiiites patens, Carruthers. 

 J'inifes jwtloniensis, Carruthers. 

 Vitrite.s sussexiensis (Mantell), Jirongn. 

 Weiclweliu retlcnlata (S. & W.), Ward." 



