70 Geological Society : — 



referable to the genera Helix, Vertigo, and Proserpina, and a Chara- 

 seed, were discovered. 



The author concluded by pointing out the peculiarities presented 

 by the Liassic strata in Glamorganshire, with special reference to the 

 stratigraphical position of the Sutton Stone and the Conglomerates 

 of Brocastle &c. 



April 3, 1867.— Warington W. Smyth, Esq., M.A., F.R.S., 



President, in the Chair. 



The following communications were read : — 



1. " Remarks on the Drift in a part of Warwickshire, and on 

 the evidence of glacial action which it affords." By the Rev. P. 

 B. Brodie, M.A., F.G.S. 



The later Drift- deposits in the district treated of occur along the 

 valley of the Avon, and consist of the usual sands and gravels, with 

 Mammalian remains ; but as yet no Flint Implements have been 

 discovered in them. The author enumerated the different kinds of 

 rock represented by pebbles or fossils in the gravel, and referred to 

 the abundance of flints and the occasional occurrence of pieces of 

 chalk in the gravel as proof that their mode of conveyance was by 

 icebergs, unless it be conceded that the Cretaceous formation at one 

 time had a much further extension northwards. The abundant 

 quartzose pebbles occurring in the drift of Warwickshire have re- 

 cently yielded fossils identical with those occurring in the pebbles at 

 Budleigh Salterton ; and the author suggests that they had a similar 

 origin to those in Devonshire. 



2. "On the dentition of Rhinoceros leptorhinus" (Owen). By 

 W. Boyd Dawkins, Esq., M.A. (Oxon.), F.G.S. 



The Pleistocene species of Rhinoceros in Britain are four in 

 number: — R.tichorhinus, Cuv.; R.megarhinus, Chvistol; R.Etruscus, 

 Falc. ; and R. leptorhinus, Owen [=R. hemitoechus of Falconer]. 

 The last of these is characterized by the possession of a partially 

 ossified septum between the nares, and by the slenderness of its 

 bones. In common with the other three, it was bicorn. Its upper 

 molar series, as compared with the megarhine, is characterized by 

 the following points : — by the rugosity of the enamel surface ; by 

 the development of a third costa on the posterior area of Pm. 3, 4 ; 

 by the concavity of the base of the external lamina ; and by the 

 more vertical direction of the inner side of the colles. The absence 

 of the anterior combing -plate and the stoutness of the guard are 

 among the points that separate it from the tichorhine molars. The 

 species does not seem to have existed in Britain before the 

 great glacial epoch, the remains from the Forest-bed attributed to 

 it by Professor Owen, viewed by the light of other specimens, 

 turning out to belong to R. Etruscus. It is associated with the 

 tichorhine species in Wookey Hole Kyeena-den, with that and the 

 megarhine in the Lower Brick-earths of Crayford, in Kent. In a 

 word, there is ample evidence to prove that it was coeval with the 

 Mammoth and tichorhine Rhinoceros, that it ranged from Yorkshire, 

 through the eastern counties, into South Wales, and the south-west of 



