218 Reports and Proceedings. 



quartzose pebloles 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 Bhmoceros leptorMnus." (Owen). By 

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



The Pleistocene species of Ehinoceros in Britain are four in 

 number : B. ticliorhiniis, Guv. ; B. megarhimis, Christol ; B. Etruscus, 

 Falc, ; and B. leptorhiniis, Owen [=i2. Jiemitcechus of Falconer]. 

 The latter 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 characterised 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 B. Etruscus. It is associated with the 

 tichorhine species in Wookey Hole Hysena-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 Ehinoceros, that it ranged from Yorkshire 

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

 England, and that it was very inferior to those animals in point of 

 number. Its nearest living analogue is the bicorn Ehinoceros of 

 Sumatra. The dentition both of the tichorhine and leptorhine 

 species agrees remarkably in one point, that it is more specialized or, 

 in other words, more closely allied to living forms than that of the 

 megarhine, a fact that seems to the author to imply that both came 

 into being after the less specialized B. megarJdnus had ceased to exist. 



3. "On the strata which form the base of the Lincolnshire 

 Wolds." By John W. Judd, Esq., F.G-.S. 



After giving a sketch of the previous very scanty literature of the 

 subject, the author proceeded to describe the outcrop and the various 

 outliers and inliers of the " Hunstanton Eed Limestone," which in 

 this district serves as a well-marked datum line in the series of 

 strata. It was shown that this bed, while maintaining much 

 uniformity of lithological and paleeontological characters, undergoes 

 a regular attenuation southwards, being 30 feet thick at Speeton, 14 

 feet and upwards in Lincolnshire, and 4 feet at Hunstanton, thinning 

 out entirely about 12 miles south of the last-mentioned place. 



In the second part of the paper a general sketch of the Chalk 

 formation in Lincolnshire was followed by detailed descriptions of a 

 number of red beds, previously confounded with the Hunstanton 

 Limestone, but now shown to be intercalated in the series of the 



