286 



1434. The body of an anterior caudal vertebra of a large Delphinus. The epi- 



physial articular plates are anchylosed and the whole is petrified : it has 

 been waterworn and apparently perforated by sea-shells. 



Locality unrecorded. Hunterian. 



1435. The body of an anterior caudal vertebra of a Delphinus, wanting the 

 terminal epiphysial plates and partially petrified. 



Locality unrecorded. Hunterian. 



1436. A caudal vertebra of a smaller species of Delphinus, with the terminal 



epiphyses confluent with the body. 



Locality unrecorded. Hunterian. 



1437- A more posterior caudal vertebra of the same species of Delphinus. 



Locality unrecorded. Hunterian. 



1438. A posterior caudal vertebra of a Delphinus. The epiphysial articular 



plates have been detached from the body. 



Locality unrecorded. Hunterian. 



Genus Monodon. 



1439. A portion of the tusk of a male Narwhal (Monodon monocer os, Linn.) : 



the exterior surface shows the characteristic spiral indentations ; on the 

 inside is the smooth surface of the extended pulp-cavity. 



From Baumann's cave. Hunterian. 



Genus Hyperoodon. 



1440. A vertical longitudinal section of an anterior caudal vertebra of apparently 

 a great Bottle-nose Whale (Hyperoodon). It displays a very uniform 

 coarse cancellous structure throughout : the longitudinal diameter of the 

 vertebra is nine inches, the vertical diameter six inches. 



The bone seems to have lost some of its original animal matter and to 

 have been partially impregnated with iron, but is not petrified. 



Locality unknown. Hunterian. 



