MKSOZOIC PLANTS PERU 63 



Podogamites sp.-Zeiller 



Fodozamites sp., Zeiller, Revue Gen. Bot. tome 25 bis, p. 19, fig. F, 

 1914. 



What appears to be a pinnule of Podozamites and one 

 readily associated with the widespread Podozamites lance- 

 olatus L. & H. is present on San Lorenzo Island and at 

 Pinonate. It is doubtfully represented at Jatunhuasi, Dept. 

 Junin. 



Genus THUITES Sternberg 



Thuites leptocladoides sp. nov. 

 PLATE; II Figs. 5, 6 



Pagiophyllum sp. cf. cirinicum var uncinatum Salfeld, Gesell. 

 Erdkunde Leipzig, Bd. 7, p. 217, 1911. 



Based upon a slender twig with short stout bluntly pointed 

 falcate leaves, broadly united to the axis and slightly de- 

 current, opposite, and arranged in two cycles. The twig is 

 about 3 mm. in diameter and the leaves are about 2 mm. long 

 and approximately circular in cross section. 



The material is altogether inadequate for a proper descrip- 

 tion but the form and arrangement of the leaves is so char- 

 acteristic that additional material should be readily recogniz- 

 able. The type comes from Jatunhuasi in the Department 

 of Junin. 



The form from Huallanca, Dept. Huanuco which Salfeld 

 listed as Pagiophyllum cf. cirinicum var unicinatum Saporta 

 is neither described nor figured but from the comparison sug- 

 gested it is probably an occurrence of this species of Thuites 

 since it is often not easy to distinguish between a cyclic and 

 spiral phyllotaxy and Pagiophyllum often looks superficially 

 much like Thuites. 



This form is exceedingly close to Thuites leptocladus de- 

 scribed by Saporta 21 from the Upper Jurassic of Portugal 

 and were it not for the remoteness of the two occurrences I 

 would be inclined to consider them identical. I have perpet- 



Saporta, G. de., Fl. Foss. Port. p. 55, pi. 5, figs. 12-16, 1894. 



