MESOZOIC PLANTS PERU 49 



species of Otozamites. All of these genera except Klukia 

 are represented in the English Weaiden, only Ruffordia is 

 represented in the Potomac flora of the eastern United 

 States. None are certainly represented in the Neocomian 

 of Japan or the Uitenhage series of South Africa or the 

 Knoxville of Pacific North America. 



Considering the list as a whole their affinities are about 

 equally divided between Upper Jurassic and Neocomian. 

 The nearest Lower Cretaceous floras are those of North 

 America and these are rather different from the Peruvian 

 flora. The nearest Upper Jurassic flora is that of Graham 

 Land monographed by Halle. 6 This is extensive and well 

 preserved flora with a notable display of Otozamites and, 

 except for the absence of Weichselia which is so abundant in 

 the Peruvian flora, it contains nearly all of the types repre- 

 sented in that flora. 



When a representative flora shall have been collected from 

 the Mesozoic rocks of Peru it will doubtless be easy to deter- 

 mine its exact age and the impressions derived from a con- 

 sideration of the meager list of forms at present known 

 may be entirely invalidated. In themselves, however, they 

 impress me as more strongly late Jurassic than Lower Cre- 

 taceous in their facies. 



DESCRIPTION OF FOSSIL PLANTS 

 Genus EQUISETITES Sternberg 

 Equisetites Lyelli Mantell (?) 



Equisetites Lyelli Neumann, Neues Jahrb. Beil. Bd. 24, pp. 77, pi. 

 i, fig. 2, 1907. 



This rather common Neocomian species of Equisetum was 

 fully discussed by me in 1911 to which reference is here 

 made, 7 since it seems undesirable to seriously consider the 



8 Halle, T. G., Wiss. Ergeb. Schwed. Sudpolar-Exped. 1901-1903, 

 Band 3, Lief 14, 1913. 



7 Berry, E. W., Maryland Geological Survey, Lower Cretaceous, p. 

 311, pi. 41, figs. 7, 8, 191 1. 



