536 



CYCADOPHYTAN FRONDS 



[CH 



is occasionally visible. In habit the fronds bear a close resem- 

 blance to those of Encephalartos 

 longifolius Lehm. The veins diverge 

 from the base and are for the most 

 part parallel, though divergent at 

 the bluntly rounded apex. If, as 

 may be the case, a specimen figured 

 by Hugh Miller 1 from Scotland as 

 Zamites and subsequently named 

 by Richards 2 Podozamites Milleri 

 is identical with Z. Carruthersi, the 

 specific name Milleri has priority. 



Zamites Buchianus (Ettings- 



hausen). 



A Wealden and Lower Cretaceous 

 species 3 (figs. 601, A C ; 602) repre- 

 sented in several European localities, 

 also in North America and Japan, 

 reaching a length of over 70 cm. ; 

 in habit very similar to Ceratozamia 

 mexicana, Macrozamia Macleayi and 

 some other recent Cycads. The 

 rachis has a fairly broad median 

 groove on the upper surface ; pinnae 

 alternate, opposite or sub-opposite, 

 from 3 to 20 cm. long and from 1-5 

 to 2 cm. broad, linear, generally 

 narrowed towards the base, but in 

 the more slender segments the re- 

 duction in breadth is less obvious ; 

 attached obliquely to the rachis, 

 slightly thickened and broadened 

 at the base (fig. 601, C), separated 

 from the rachis by a distinct absciss- 

 layer and leaving an elliptical scar ; 

 usually inclined at about 45 but 



FIG. 602. Zamites Buchianus. 

 (British Museum, V. 2120; nat. 



size.) 



1 Miller (57) B. fig. 136. 2 Richards (84) p. 120. 



3 Ettingshausen (52) B. p. 21, PI. i. fig. 1 ; Seward (95) A. p. 79, Pis. in., iv., vm. 



