XLVIII] PITYOSTROBTTS 383 



Pityostrohus Sauvagei (Fliche and Zeiller). 



The type-specimen of this species^, from the Portlandian of 

 Boulogne, is an ovoid cone 4-5 cm. long characterised by distally 

 expanded scales and resembling the small cones of Pinus Laricio. 

 In the absence of further data precise identification is not possible 

 though the fossil is probably correctly regarded as an Abietineous 

 cone of the Pinus Pinaster type. Having regard to the fact that 

 in this and the preceding species the determination is based solely 

 on external form no very definite statement is admissible as to 

 systematic position, but such evidence as there is favours the view 

 that in these two cones we have Jurassic representatives of two 

 sections of the genus Pinus. 



Pityostrohus Dunkeri (Carruthers). 



Several detached cones bearing imbricate scales, broad and flat 

 like those of Picea, some species of Abies in which the ovuliferous 

 scales are longer than the bract-scales, and certain species of Pinus 

 characterised by flat scales instead of the woody scales of the Pinus 

 silvestris and P. Pinaster type have been described from British 

 Wealden strata as also from other countries. Gardner^ instituted 

 the following species : Pinites Carruthersi, P. valdensis, P. cylin- - 

 droides^, P. pottoniensis^, but an examination of the type-specimens 

 shows that the distinctive features are not sufiiciently well marked 

 to warrant so many specific names. The Lower Greensand specimen 

 from Potton, P. cylindroides, is water-worn and the shape of the 

 imperfect scales is not the original form ; it may possibly be identical 

 with P. valdensis, P. Carruthersi, and P. pottoniensis, and there are 

 no important features in which these forms differ from the longer 

 cones of Pityostrohus Dunkeri. The cones from Brook in the Isle 

 of Wight named by Carruthers* Pinites Dunkeri were originally 

 described by Mantell as Ahietites Dunkeri^; they reach a length of 

 over 33 cm. and have a breadth of 3 cm., they are elongate-oval and 

 relatively narrow and the long scales are attached to a slender axis 

 (fig. 778). The seeds, apparently two on each scale, are oval and 

 compressed. Cones of similar form and length are described by 



1 Fliche and Zeiller (04) p. 804, PI. xix. fig. 7. 



2 Gardner (SB^). 



. 3 See also Seward (95) A. p. 193; Stopes (15) pp. 138, 140. 



Carruthers (66^) PI. xxi. figs. 1, 2. ^ Seward (95) A. p. 194. 



