58 CETACEA. 



Scaldicetus carreti, Du Bus \ 



The type species. 



Hah, Europe (Belgium). 



M. 3658. Cast of a tooth. The original, which is from the Antwerp 

 Crag, is preserved in the Museum at Brussels. The pulp- 

 cavity is still open. 



Presented by E. T. Newton, Esq., 1887. 



Genus BAL^NODON, Owen 2. 



Of uncertain affinities. Identified by the present writer in the 

 ' Quart. Journ. Geol. Soc' vol. xliii. p. 14, with the preceding genus, 

 but later observations tend to render this very doubtful ; it has been 

 identified by Gervais with Roj>locetus. 



Balsenodon physaloides, Owen^ 



Hah. Europe (England). 



27862. The lower portion of an imperfect tooth ; from the Red Crag 

 (Fig.) of Eelixstowe, Suffolk. This specimen is the type, and 

 is described and figured by Owen in the * British Fossil 

 Mammals and Birds,' p. 525, figs. 119, 226, 227, where 

 it is regarded as a complete section of a tooth and the 

 external layer described as cement and the axis as dentine. 

 Presented by John Brown, Esq., 1852. 



Genus PHYSODON, Gervais ^ 



Syn. Palceodelphis, Du Bus s. 



The teeth of this genus indicate animals much inferior in size to 

 the Cachalot. The whole tooth is subcylindrical and frequently 

 curved; the crown is comparatively short and coated with a finely 

 grooved enamel, and the layer of cement is generally of considerable 

 thickness ; there is no constriction at the base of the crown, which 

 is larger than in Hoplocetus. The teeth sometimes present a con- 

 siderable resemblance to those of some of the larger Seals, but are 

 readily distinguished by the thickness of the cement, which fre- 

 quently splits off in the characteristic Cetacean manner, and exposes 

 the dentine core marked by the peculiar horizontal lines. 



' Bull. Ac. E. Belg. ser. 2, vol. xxiv. p. 568 (1867). 

 ^ British Fossil Mammals and Birds, p. 536 (1846). 

 ^ Loo. cit. 



* Bull. Soc. Geol. France, ser. 2, vol. xxix. p. 101 (1872). 

 ' Bull. Ac. E. Belg. s6r. 2, vol. xxxiv. p. 503 (1872). 



