Antediluvian Zoology mid Botariy. 



265 



genera Zamia and Cycas, Dracae^na draco, Cactus, and Filicites. 

 (M 50.) 



50 



Jointed and fluted stems of plants [reetls ?] abounding in-shale in the Hastings sandstone series. 

 The fragments are introduced here chiefly because they do not appear in Mr. Mantell's Fossils of 

 Tilgate Forest. 



Some singular vegetable productions, which occur silicified 

 in the freestone of the Isle of Portland, and are locally termed 

 petrified birdsnests, have recently been subjected to the ex- 

 amination of Mr. Brown, Dr. Buckland, and Mr. Loddiges, 

 who conceive them to be the bases of the stems of plants allied 

 to Zamia and Cycas, and their structure is such as to suggest 

 their forming a link between the coniferous plants and the 

 Cycadese. (.7%". 51.) These also are proper to tropical climates. 



Cycadeoidea raicrophjrlla, silicified in the Portland oolite. 



Vol. HI. — No. 13. t 



Trans. Geol. Sac, vol. ii. pi 49. fig. 2. 



