322 AGE OF THE UITENHAGE BEDS 



and that this may have been accompanied by a drier 

 climate. 



Kegarding the age of the Uitenhage beds, Prof. 

 Seward J has, from a study of the plant remains, come 

 to the conclusion that the flora is related to that of both 

 the Jurassic and Wealden (Lower Cretaceous) of other 

 countries, but that the relationship as a whole is closer 

 to the latter than to the former. 



The best evidence for the correlation of the Uitenhage 

 formation with foreign beds is furnished by the marine 

 fossils of the Sunday's Kiver beds ; the relationship of 

 the different classes of fossils has been carefully dis- 

 cussed by Dr. F. L. Kitchin, 2 and the following account 

 is a summary of his conclusions. 



For correlation with the European beds the cephalo- 

 pods are the most valuable fossils ; the South African 

 species of Holcostephanus have closely allied forms in the 

 Upper Valanginian and Lower Hauterivian beds, which 

 are the middle part of the Neocomian series ; and the 

 genera Hamites, Crioceras, Bochianites, and Acanthodisous 

 are characteristic Cretaceous forms. Some of the 

 Trigoniae and several other lamellibranchs are also 

 closely related to European Neocomian species. Cer- 

 tain Trigoniae, especially T. ventricosa and T. holubi, are 

 very closely related to species in the Oomia beds of 

 Cutch, which also contain species of Seebachia and 

 Cucullaea very like Uitenhage forms. In German East 



1 A. S. A. M., iv., part i., pp. 43-46. 



2 Kitchin, G. M., 1907, pp. 239-95, and p. 480, 4. S. A. M., vii., 

 part ii,, 1908. 



