Art. VI. — Note on a Tooth of F 

 Beaumaris. 



By T. S. Hall, M.A., and G. B. Pritchard. 



[Read lOth June, 1897.] 



Some years ago one of us found on the beach at Beaumaris, 

 just below the present hotel, a mammalian tooth which is of some 

 interest. The geology of the locality has been briefly dealt with 

 by us in a previous paper (1., p. 190) ; but, not feeling sure of the 

 nature of the tooth, we made no reference to it till it had been 

 examined by some one well qualified to give an opinion upon it. 

 As Mr. C. W. De Vis has long been working at our fossil 

 mammals, we sent the tooth to him, and Ave wish to express our 

 thanks to him for tlie information which he, as usual, so promptly 

 supplied. 



Unfortunately the tooth was not found /;/ si'///, but loose 

 among the pebbles on the beach floor, so that the precise horizon 

 cannot be definitely asserted. The locality has long been a 

 favourite collecting ground for shark's teeth, which used to occur 

 in great numbers on the beach, but the steady search of numerous 

 visitors has now rendered them scarce, so that instead of getting 

 forty or fifty in an afternoon, a couple may be all that reward a 

 careful search. These teeth seem to have been derived from a 

 thin band about low water level which has yielded many other 

 fish teeth and the remains of Physetodon bailevaiia., M'Coy. The 

 presence of fossil wood in the deposit shows that land was at 

 no great distance at the time when the marine beds were laid 

 down. Below the beach floor the beds ai-e undoubtedly of Eocene 

 age, and those of the cliff's were referred to the same age by 

 Messrs. Tate and Dennant. From this view we dissented, and 

 gave our reasons in the paper above referred to (1). As far as 

 we have been able to discover, no beds of later age occur in the 

 neighbourhood from which the fossil could have come, and its 

 mode of preservation and general appearance is very similar to 

 the tertiary bones found at the same place. Still till further 



