ADDENDUM. 2b3 



30346 a. Seven upper true molars, one upper premolar, and two 

 lower true molars ; from the Headon beds (Upper Eocene) 

 of Hordwell, Hampshire. Some of these teeth, as well 

 as those of the succeeding specimens, are slightly larger 

 than any of those noticed by Filhol in the Ann. Sci. Geol. 

 vol. viii. art. 1, pp. 87-103. 



Hastings Collection. Purchased, 1855. 



29741. Part of the right ramus of the mandible, containing the 

 canine and four cheek-teeth ; from the Headon beds of 

 Hordwell. Hastings Collection. Purchased, 1855. 



30323. Fragment of the right ramus of the mandible, with the 

 three true molars ; from the Headon beds of Hordwell. 



Hastings Collection. Purchased, 1855. 



30856. Fragment of the right ramus of the mandible, with ^~2 and 

 mTa ; from the Headon beds of Hordwell. 



Hastings Collection. Purchased, 1855. 



29864. Fragment of the right ramus of the mandible, with p m . 4 

 and ni. l ; from the Headon beds of Hordwell. 



Hastings Collection. Purchased, 1855. 



Order EODENTIA. 

 Genus CASTOR (page 216). 



Cantor canatfrns'fe, Kuhl 1 . 

 Hob. North America. 



M. 1958. Part of the left ramus of the mandible, with the first 

 three cheek-teeth ; from the Pleistocene of Owyhee, Rocky 

 Mountains. Presented by Sir R. Owen, K.C.B., 1884. 



1 Beitrage z. Zoologie, p. 64 (1820). 



