Vol. 5] Jordan. — The Fossil Fishes of California. 



103 



Genus Galeus Rafinesque. 

 (Galeorhinus Blainville: Galeus Cuvier.) 



5. Galeus (zyopterus Jordan & Gilbert) ? 



A tooth belonging to a species of Galeus is in the Rivers' Col- 

 lection from the Pliocene of Temescal Canon, in the Santa Monica 

 Mountains. It is similar to the teeth of the living "Soup-fin 

 shark," Galeus zyopterus of the California coast, although the 

 tooth is more nearly erect and less notched on the outer margin 

 than are most of the teeth in that species. The tooth is small, 

 narrowly triangular, turned moderately outward, the base with 

 five small cusps on the inner margin, the cusp nearly entire. 



Genus Carcharias Rafinesque. 

 (Carcharlvinus Blainville: Carcharias Cuvier.) 



6. Carcharias aiitiquus (Agassiz). 



(Frionodon aiitiquus Agassiz, 1. c. p. 273; Ocoya Creek.) 

 To this species we refer two small teeth from near Oil City in 

 the lower Miocene. 



The one is triangular, strongly bent outward, the outer margin 

 nearly vertical, but not forming a right angle with the root. The 

 inner margin is nearly straight. The tooth is everywhere serru- 

 late, the inner margin slightly so, the outer margin more dis- 

 tinctly, the serra? larger toward the base. 

 The tooth is about 1-3 inch in height. The 

 other tooth is narrower, more erect, with 

 wider base, wider than the tooth, and 

 slightly cordate. 



Agassiz states that "a transverse section 

 of the fossil under consideration moreover 

 shows these teeth to have a central cavity as 

 in those of the whole tribe of Carcharias.''' 

 Fig. 5. Upper figure According to Agassiz, the larger and 



Carcharias sp -Miocene, broader specimens of this species have the 



Oil City, California. 1 1 



Lower figure Carcharias edges of the teeth serrated, especially at the 



antiquus (Agassi/,)- Dasej while the narrower ones are smooth 

 Miocene of Kern Co., 



California. and sharp. I am not quite sure that these 



