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



101 



Family HEXANCHIDiE. 

 Genus Heptranchias Rafinesque. 



3. Heptranchias andersoni Jordan, new species. 



Of this species, apparently undescribed, I have four teeth 

 from Barker's Ranch, Kern County, collected by Mr. P. M. An- 

 derson, placed in the Museum of the California Academy of 

 Sciences. Three of them are apparently submedian teeth from 

 the upper jaw. Each of these teeth consists of two equal cusps, 

 turned somewhat outward and almost equally so. In both of 



these the anterior cusp is 

 rather coarsely serrated at 

 base. The other tooth is a 

 lateral one from the lower 

 jaw. It consists of eight 

 cusps, the first not espe- 

 cially enlarged, the others 

 progressively smaller, the 

 last three more rapidly re- 

 duced ; edges of the cusps 

 entire. The species is prob- 

 ably a Heptranchias, but it 

 is possibly a Hexanchus. 

 The teeth have more cusps than in the living species, Heptran- 

 chias macidatus of the coast of California. One of these speci- 

 mens only escaped the fire of 190H. 



The species is named for Mr. Frank M. Anderson, Curator of 

 Palaeontology in the California Academy of Sciences. 



Family CARCHARIIDiE. 

 Genus Galeocerdo Muller & Henle. 



4. Galeocerdo product us Agassiz, Agassiz, Am. Jour. Sci. Arts, 



1856, p. 273; U. S. Pac. R. P. Surv., p. 314, pi. 1, f. 1-6. 

 This species is said to differ from the extinct Galeocerdo 

 adunciis of the Swiss Eocene, "chiefly in having the anterior 

 margin of the tooth less arched, with much more minute crenula- 

 I ions, and the serrations on the basilar margin far smaller." 



Fig. li. Heptranchias andersoni 

 .Jordan. Miocene of Kern County, Cali- 

 fornia. Type specimen. 



