i2o STUDIES IN GEOLOGY, No. 4 



Although Saporta and others have referred Tertiary fern 

 to Goeppert's genus Cyatheites this genus was based on Car- 

 boniferous and older Mesozoic forms of varied relationships 

 and certainly not related to the present species, so that this 

 very appropriate generic name is not available. The generic 

 term Cyatheopteris of Schimper was based upon a European 

 lower Triassic specimen of a trunk, similarly unrelated to the 

 present species. 



Cycadop hyta 



Order CYCADALES 



Family CYCADACE^E 



Genus ZAMIA Linne 

 Zamia tertiaria Engelhardt 



PLATE VIII Fig. 4; PLATE II Figs. 1-3 



Zamia tertiaria Engelhardt, Abh. Senck. naturh. Ges. Bd. 16, p. 

 646, pi. 2, fig. 16, 1891. 



"Monokotyler Blattrest" Engelhardt, Idem., p. 686, pi. I, fig. 4. 



Description. Leaflets of variable size, prevailingly large, 

 lanceolate and inequilateral in outline. Apex and base 

 equally acuminate, the apex somewhat more extended than 

 the base which has a blunt articular surface about 2 mm. in 

 width. Texture coriaceous, the very numerous parallel veins 

 being immersed in the substance of the lamina, Length in 

 the collected material ranging from 8 cm. to 18 cm., aver- 

 aging about 13 cm. Maximum width, in the middle region 

 or slightly below, ranging from 1.2 cm. to 3 cm., indicating 

 large leaves with numerous, rather close set pinnules. 



Although no complete leaves were seen, the shales were 

 sometimes packed with the pinnules, which were apparently 

 not firmly attached to the rachis. Since, however, the mater- 

 ials that made up the coal seams was drifted material it is 

 not surprising that the leaves are broken up. In several in- 

 stances fragments were found showing the pinnules in nor- 

 mal orientation. One such specimen is figured where the 



