FLORA OF THE WEALDEN EPOCH. 



85 



the Linn. Trans., under the name of Bennettites (Plate II. 

 Fig. 3). In the Wealden at Brook Point, Isle of Wight, 

 Cycads have been detected allied to Encephalai-tos. The 

 fruits of them are described by Carruthers as Cycadeostrobus. 

 He describes the following species : — Cycadeostrobus oyatus 

 (Plate II. Fig. 1), C. truncatus, C. tumidus, C. elegans, C. 

 Walkeri, C sphtericus, in the Oxford 

 clay of Wiltshire ; C. prima3vus in the 

 inferior Oolite at Burcott Wood and 

 Livingston, and C Brunonis. Mantell 

 states that he has found 40 or 50 fossil 

 cones in the Wealden of England ; they 

 belong either to the genus Cycadeo- 

 strobus or to the pines mentioned below 

 as occurring in the Wealden. The 

 Wealden fresh-water formation termi- 

 nates the reign of Gymnosperms. Car- 

 ruthers gives the following list of the remains of Conifene 

 which have been found in the secondary strata of Britain, 

 excluding the Trias : — 



Upper Chalk. — Wood in flint nodules. 



Upper Greensand. — Foliage and cone of Sequoiites Woodwardii 3 

 cone of Pinites oblongus. 



Gault. — Cones of Pinites gracilis and P. hexagoniis, Sequoiites 

 Gardneri and S. ovalis. 



Lower Greensand. — Water-worn and bored pieces of wood ; cones 

 of Pinites Benstedi, P. Sussexiensis, and P. Leckenbyi. 



Wealden. — Driftwood, foliage' of Abietites Linkii; cones of Pinites 

 Dunkeri, P. Mautellii, P. patens, and P. Fittoni, and of Ai'aucaria 

 Pippingfordensis ; foliage (and drupes 1) of Thuites Kurrianus. 



Purbeck. — Fossil forest in situ at Isle of Portland ; cone " nearly 

 related to Araucaria excelsa " in the Dirt-bed. 



Portland Stone. — Driftwood Araucarites. 



Kimmeridge Clay. — Cone of Pinites depressus. 



Ficr, 90. 



Fig. 90. Fossil Wood, Ahietites LinJcii. A Coniferous plant from 

 the Wealden, showing punctated woody tissue and medullary rays. 



