110 ZAMITES. 



In 1828 Buckland refers to tte specimen, flgui-ed by Stemlaerg 

 from Sowerby's drawing, as an amentum of a Cycadeoidea. 

 Brongniart, in his Prodrome, includes the Stonesfield stem in 

 his genus BucMandia. Carruthers compares the stem with those 

 of recent Cycads, and adds that the data afforded by the single 

 specimen are insufficient to enable him to refer it with certainty to 

 its proper genus.' 



The type-specimen is in the form of a cast 1 8 cm. long ; in the 

 lower part it shows a pith-cast 2-3 cm. broad, with irregular 

 lozenge - shaped projections which represent the meshes of the 

 inner face of the cylinder of wood. Several thick, crowded, and 

 imbricate leaf-bases are well preserved, and exhibit a striking 

 similarity to the persistent petiole-bases on the stems of 

 Enc&phala/rtos and other existing Cycads. There is no trace of 

 any lateral fertile axis, as in the typical Bennettites. A pith-cast 

 very like that of Cycadeoidea squamosa has been figured by Lignier 

 from the Lias of Ste. Honorine-la-Guillaume as Cycadeon 



V. 4669. A portion of a medullary cast of a Cycadean stem, 

 possibly Cycadeoidea squamosa. 



Stonesfield. Egerton Coll. 



Genus ZAMITES, Brongniart. 

 [Prodrome, p. 94, 1828.] 

 For a discussion on the use of this generic term reference may be 

 made to vol. ii. of the Wealden Flora? 



Zamites megaphyllus (Phillips). 



[Geol. Oxford, p. 169, Diag. xxx. fig. 1, 1871.] 

 (PI. X. Figs. 4-5; PL XII. Figs. 1, 3-5; Text-fig. 11.) 



1871. Falmozamia megaphylla, Phillips, Geol. Oxford, p. 169, Diag. xxx. 

 fig. 6. 

 P. longifoUa, op. oit. p. 169, Diag. xxx. fig. 6. 

 1873. ? Yuccites Schimperianus, Zigno, Flor. fosa. Oolit. vol. ii. p. 7, pi. xivi. 



1 Carruthers (70), p. 687. 

 " Lignier (95), pi. vii. fig. 7. 

 3 Seward (96), p. 75. 



