AND 8ALENIA FROM SOUTH AUSTRALIA. 259 



longer be considered Cretaceous, and the arguments for and against 

 evolution in Dicotyledons based upon the age of these plant-types 

 would be greatly modified. 



Mr. A. W. Waters said that two years ago he exhibited to the 

 Society Belemnites from Ronca. Since then it has been shown by 

 M. Bayan and Prof. Hebert that in the deposit at Ronca there are 

 rolled fossils from the still older Tertiary beds ; but the Belemnites 

 are not rolled. Although there is every possibility that they may 

 be Tertiary, it is by no means certain. Some geologists think that 

 they resemble Liassic forms ; but they certainly are not similar to 

 Mr. Tate's Belemnites. 



Rev. J. F. Blake remarked that Mr. Tate's Belemnites were more 

 like Oolitic than Cretaceous forms ; and they certainly did not belong 

 to the genus Belemnitella. The interest of the case, as the President 

 had pointed out, consists in the carrying on of Cretaceous life into 

 Tertiary times ; and this favours the idea of a non- uniform deposition 

 of beds, and a more continuous succession of life in Australia than in 

 Europe. 



Prof. T. Rupert Jones said that, in 1857, Belemnites found in a 

 Tertiary deposit of North-west Germany were exhibited at the 

 meeting of the Naturalists' Association at Bonn. 



Prof. Seeley remarked that it was impossible, from the material 

 before the Society, to determine the species to which the Belemnites 

 might belong. The characters were not sufficiently clear to show 

 whether it was a true Belemnites, or ought to form a distinct but 

 allied genus. He agreed with Mr. Gardner with regard to the 

 resemblance of American Cretaceous shells to those of the English 

 Tertiaries. 



s2 



