64 OTOZAMITES. 



compare Otozamites Klipsteinii. Among recent cycadean species 

 we do not meet with fronds possessing pinnae with a well-defined 

 auriculate base, but we are not without instances of fronds which 

 in other respects bear a decided resemblance to the "Wealden plant. 

 Zamia, purpuracea, Ait., may be cited as one recent species with 

 large pinna? comparable to those of the Wealden plant ; the young 

 pinnae of this living cycad are very similar in form to the more 

 terminal segments of Otozamites Beanii. In this species of Zamia, 

 as also in Z. pygmcea, Sims, and in some other forms, etc., the 

 pinnae are distinctly narrowed towards the point of attachment 

 to the rachis, from which they are readily detached, leaving a 

 well-marked scar. The recent fronds correspond rather more 

 closely with such fossil forms as Podozamites Reinii, Geyl., etc., 

 described by Geyler 1 and others. In Otozamites latifolius (Phill.) 3 

 we have another large-leaved form which may to some extent 

 be compared with the present species : the specimens of Phillips' 

 species are imperfectly preserved, and do not give any decided 

 indication of an auriculate base ; the venation appears to agree 

 fairly closely with that of Nathorst's genus Ptilozamites, and the 

 prominence of the veins reminds one of some of the large and 

 boldly veined segments of such recent species as Zamia picta, 

 Z. Skinneri, Warsz., etc. 



V. 2336. PI. I. Kg. 3. This terminal portion of a frond 

 must no doubt be referred to the same species in which the 

 detached segments figured by Dunker and Schenk have been 

 included. In Bunker's specimens there is not the same distinctly 

 auriculated base as in this example, but this may be put down 

 to less perfect preservation and possibly inaccurate drawing ; in 

 Schenk' s leaflet of the same species the auriculate base is distinct, 

 and agrees exactly with that in the English frond. The veins 

 appear to be rather fewer and farther apart in this terminal 

 portion than in the pinna? of the larger fronds. Largest pinna 

 2 cm. by 9 mm. Ecclesbourne. Rufford Coll. 



V. 2170^. Two detached pinna? ; the venation finer, and exactly 

 like that in Schenk's example. Ecclesbourne. Ritfford Coll. 



1 (A.), Palneontographica, vol. xxiv. pi. xxxiv. 

 z Phillips, p. 171, fig. 6. 



