148 BKACHTPHTLLTnu:. 



a carbonaceous impression of a twig bearing thick fleshy leaves 

 apparently disposed in pairs, but in some places (as in examples of 



Fig. 20.—Tliuites, sp. 52,838. Nat. size. 



Thuites expansus) the whorled arrangement is by no means obvious. 

 Christian Malford (Oxford Clay). Cunnington ColL 



CONIFERALES INCERT^ SEDIS. 



Genus BRACHYPHYLLTJM. 



Brachypliylluni, sp. «. 



(Cf. B. mamillm-e, Brongniart.) 

 (PI. IX. Fig. 5.) 



11,130. PI. IX. Kg. 5. 



This specimen may be provisionally referred to the genus 

 Braehyphyllum ; it agrees closely in habit with Thuites expansus, 

 but the leaves are apparently spiral in their arrangement. This 

 and other similar examples are too small and imperfect to assign 

 with confidence to a distinct species, but they may be identical 

 with the Yorkshire Inferior Oolite type, Brachyphyllum mamillare, 

 Brongn. It is by no means easy, in many cases, to decide between 

 Brachyphyllum and Thuites as the most fitting generic designation 

 for coniferous twigs, and possibly some of the fossils referred to 

 Thuites expansus are fragments of a Brachyphyllum. 



Stonesfield? Mantell Coll. 



V. 4676. A branched shoot with leaf-areas of the Brachy- 

 phyllum type. 



Barnack (Inferior Oolite). 



