FOSSIL TOOTH OF OTODUS. 351 



Norfolk ; those of the former exceeding the latter in the pro- 

 portion of at least 2 to 1 : while I have noticed that the teeth 

 found in the supposed hyaena's retreats, exhibit a proportion 

 intermediate to these two. 1 fully anticipate that sooner or 

 later it will be found that several species have been confound- 

 ed under the name Elephas primogenius. 



In the first volume of the new series of this Magazine, p. 

 226, I have noticed the occurrence of the teeth of a gigantic 

 shark (Carcharias megalodon) in the red crag of Suffolk, and 

 have given an engraving of a particularly fine specimen of 

 that species in the cabinet of Mr. Colchester, of Ipswich. — 

 The name Otodus has been lately applied by Agassiz ■ to the 

 largest teeth in the family of sharks which occur in the Lon- 

 don clay, and the tooth of this genus now figured (41) I be- 

 lieve to be unique as regards size and perfect state of preser- 



41 



Tooth of the Fossil Genus Otodus. 



vation. It was found in the cliffs at Walton, in Essex, by a 

 servant of Lord Sidmouth, and Lady Sidmouth obligingly per- 

 mitted me to remove it from her cabinet for the purpose of in- 

 serting the present notice. In size the tooth presents us with 



1 Figures are given in the last Livraison of the * Poissons Fossiles,' but 

 no descriptive letter-press. 



