4 Annals of the South African Museum. 



liorizon furnished by species of Tr'ujonice. is regarded by Lycett ■-' as 

 pointing to a Cretaceous age. 



In 1882, as the result of an examination of a collection of shells, 

 Holub and Neumayr i classed the Uitenhage series as Neocomian, 

 thus agreeing with Lycett rather than with the earlier authors. 

 Professor Eupert Jones,]: in an article on the Geology of South 

 Africa, published in Nature, adopts Tate's opinion as to the Jurassic 

 age of the plant-beds. The verdict of Holub and Neumayr is 

 accepted by de Lapparent,§ who classes the Uitenhage series with a 

 portion of the Potomac formation of the Eastern United States as 

 Neocomian. In Oldham's edition of the 'Geology of India,' || by 

 Medlicott and Blanford, the flora of the Uitenhage series is 

 described as " distinctly related to that of the Eajmahal Group, 

 though the resemblances are not sufficient to establish a contem- 

 poraneity of origin." Messrs. Eogers and Schwarz, after discussing 

 the statements of previous writers, conclude that " the only course 

 at present open to us is to regard the age of the Uitenhage series as 

 Upper Jurassic." *\ 



The evidence afforded by the collection of plants described in the 

 following pages — a collection rich in specimens but comparatively 

 poor in species — points to a Wealden rather than to a Jurassic age : 

 but this question is dealt with at greater length in the sequel. 



II.— DESCEIPTION OF SPECIMENS. 



Group FILICALES. 

 Family POLYPODIACE^. 



Genus ONYCHIOPSIS Yokoyama. 



This genus was instituted by Yokoyama,** a Japanese author, for 

 a species originally described by Geyler f f from the valley of Tetori- 

 gawa in the Province of Kaga, Japan, as Thyrsoptcris elongata. 



* Lycett (79), p. 229. 



t Holub and Neumayr (82). See also Neumayr (87), ii., p. 330. 



+ Jones (84), p. 554. § de Lapparent (00), p. 1267. 



II Medlicott and Blanford (93), p. 205. 



^\ Rogers and Schwarz (01), p. 17. 



•* Yokoyama (89), p. 26. ft Geyler (77), p. 224. 



