PHYSETER1D.E. 61 



24596 a. The unworn crown of a smaller tooth ; from Malta. 



Purchased, 1850. 



24596 b. The root of a tooth ; from Malta. Purchased, 1850. 



M. 1936. A small tooth, perhaps belonging to this species ; locality 

 unknown. Presented by Prof. Sir R. Owen, 



K.C.B., 1884. 



The following rolled specimens from the Red Crag of Suffolk agree 

 very closely in general characters with the teeth of the present 

 form, and may have been derived from Miocene deposits. 

 28256. A tooth, in a partially rolled condition. The characteristic 

 constriction at the base of the crown is well marked. This 

 and the following specimens are noticed by the writer in 

 the ' Quart. Journ. Geol. Soc.' vol. xliii. p. 14. 



Purchased, 1852. 



27518. A very similar tooth. Purchased, 1852. 



27435. An imperfect tooth, with a more decided curvature. 



Purchased, 185] . 



28981. A very similar imperfect tooth, in a much rolled condition. 



Purchased, 1854. 



Hoplocetus borgerhoutensis, I >u Bus '. 



In this species the root of the tooth is much longer, more slender, 

 and much more curved inferiorly than in H. crassidens ; the stria- 

 tions on the enamel of the crown are less strongly marked 2 . 



Hab. Europe (Belgium and England). 



37944. A parti ally- worn tooth, with the root corroded ; from the 

 Antwerp Crag. This specimen is smaller than the one 

 figured by Gervais in the ' Oste'ographie des Cetace's,' 

 pi. xx. fig. 28, but is otherwise similar. 



Purchased, 1863. 



47987. An unworn tooth, probably belonging to this species ; appa- 

 rently from the Antwerp Crag. 



Presented by Hon. R. Marsham, 1877. 



1 Bull. Ac. R. Belg. ser. 2, vol. xxxiv. p. 502 (1872). 



2 In the Brussels Museum teeth resembling Gervais's figure of H. borffer- 

 houtensis are labelled (?) Palceodelphis minutus, DuBus. 



