PHOC^ENA CRASSIDENS. 519 



ated between the Stamford fossil and that large British 

 species of Delphis, which is so nearly similar in size. The 

 skull, with the numerous minute teeth, of the Porpoise 

 forms the suhject of the vignette at p. 476; and the 

 characteristic cranium of the Beluga is figured at p. 491 

 of the same work. 



I have seen no specimens of these existing British Del- 

 phinidfE meriting to be regarded as fossils; the subject 

 of the present section presents characters by which it 

 differs not only from the known existing Delphinidee of 

 our own coasts, but from all the species that have been 

 so described and figured as to admit of a comparison. 



Of the fossil Delphinida, described in other works, the 

 Phoctena Cortesii, which Cuvier*' defines as allied to the 

 Ph. orca and PJi. melas, is readily distinguished from the 

 Ph. crassidens by its more numerous and smaller teeth. 

 The fossil Delphinus, allied to the common species,-f- is 

 distinguished by its still smaller teeth ; and another extinct 

 species, from the Faluns of the " Departement des Landes,"J 

 by the long s;pnphysis of the lower jaw ; that of the 

 Stamford fossil being as short as in the Grampus. The 

 fossil Dolphin, described by M. Von Meyer under the name 

 of Arionus servqtus, had a mandibular symphysis not 

 shorter than one-third the entire length of the skull. 

 The Delphinus from the " calcaire grossier," du Departe- 

 ment de Maine-et-Loire, had seventeen teeth in each 

 alveolar series of the upper jaw. Other recorded extinct 

 Cetacea present still wider differences from the Stamford 

 fossil. 



Whether the species or variety of the Grampus indicated 



* " Un Dauphin voisin de Vepaulard et du glotriceps" ' Ossemens Fossiles,' 

 4to., 1823, t. v. pt. i. p. 208. 



t Ib. p. 316. J Ib. p. 312. 



Leonhard and Bronn, Jahrbuch fur Mineralogie, 1841, p. 315. 



