University of California Publications in Geology [Vol. 7 



Genus Hemipristis Agassiz 

 ( Dirrhizodon Klunzinger) 



7. Hemipristis heteropleurus Agassiz. 



Miocene, Oeoya Creek, Barker's Ranch, Oil City. 

 As indicated by Jordan and by Leriche these teeth are iden- 

 tical with those of Hemipristis serra of the European Miocene. 

 The genus Hemipristis is no longer represented among the living 

 fishes of America or Europe. 



8. Hemipristis chiconis Jordan. 



Chico deposits (upper Cretaceous) near Martinez. 



Genus Carcharhinus Blainville 

 {Carcharias Cuvier 1817, not of Carcharias Rafinesque 

 1810, which is Odontaspis Agassiz) 



9. Carcharhinus antiquus (Agassiz). 



Miocene of Ocoya Creek and Oil City. 



We have no new material of this species. 



The tooth indicated as No. 7 Carcharias sp. by Jordan, page 

 104 (fig. 5, upper figure) is perhaps a tooth of Carcharodon 

 rectus from near the angle of the jaw. A better specimen is in 

 the Morrice collection. We refer this with doubt to Carcharodon, 

 probably to C. rectus. 



Under the rules of the International Commission of Zoological 

 Nomenclature the name Carcharias used originally for a single 

 species, which later became the type of Odontaspis, must replace 

 Odontaspis. The great genus of sharks called Carcharias by 

 Cuvier must take the name Carcharhinus. This is a most incon- 

 venient but apparently inevitable shifting of names. 



