SQTJALO T) ONTI D ^E . 



75 



32730. The greater portion of amandibular symphysis, provisionally 



referred to this species ; from the Upper Tertiary of 



Xabrcgas, near Lisbon, Portugal. Ten teeth remain on 



either side, although some of their crowns are broken off. 



Presented by J. S. Valentine, Esq. About 1857. 



Family SQUALODONTID^). 



The cranium resembles in essential characters that of the Delplii- 

 nidce, and differs entirely from that of the Archceoceti, although the 

 teeth are differentiated into groups as in the latter. 



Genus SQUALODON, Grateloup 1 . 



Syn. Pachyodon, Meyer 2 . 

 Phocodon, Agassiz 3 . 

 (?) Ariunus, Meyer 4 . 

 Delphinoides, Pedroni 5 . 

 Crenidclphinus, Laurillard 6 . 



Stereodelphis, Gervais 7 . 

 Delphinodon, Leidy *. 

 Wiizoprion, Jourdan 9 . 

 Mucrophoca, Leidy 10 . 



Fig. 15. 



Three of the lower true molars of Sqiialodon. Miocene. 

 (After Scilla.) 



Act. Ac. B. Sci. Bordeaux, 1840, p. 208. 



Neues Jahrb. 1838, p. 414. This name is the earliest, but was preoccupied. 

 In Valentin's Rep. d'Anat. et Physiol. 1841, p. 236. Teste Brandt. 

 'Neues Jahrb. 1841, p. 315. 

 Comptes Bend us, vol. xxi. p. 1181 (1845). 

 Diet. Univ. d'Hist. Nat. vol. iv. p. 636 (1846). 

 Zool. et Pal. Frar.9aises, 1st ed. vol. i. p. 152 (1848-52). 

 Journ. Ac. Nat. Sci. Philad. ser. 2, vol. vii. p. 424 (1869). 

 Ann. Sci. Nat., Zool. ser. 4, vol. xvi. p. 369 (1861). 

 Proc. Ac. Nat. Sci. Pbilad. 1856, p. 220. 



