Vol. 5] Jordan. — The Fossil Fishes of California. 105 



on the inner margin. The tip is narrowed, sharp and entire. Be- 

 low the tip both margins are strongly serrated, the serrae or den- 

 ticles being long and narrow, but coalescent at base. There are 



Fig. G. Hemipristis heteropleurus Agassiz. Miocene of Kern County, Cali- 

 fornia. 



about twelve denticles on the crown of the tooth, and on the inner 

 margins there is a notch between the crown and the root with 

 smaller denticles. Similar denticles exist on the root. In this 

 species the denticles of the inner margin are a shade longer than 

 those on the outer, a trait supposed to mark the Californian spe- 

 cies, Hemispristis heteropleurus. 



The genus Hemipristis has been regarded as extinct, but Dr. 

 Woodward identifies it with Dirrhizodon Klunzinger, of the Red 

 Sea. 



9. Hemipristis chieonis Jordan, new species. 



In a hard sandstone rock of dark brown color, belonging to the 

 Chico division of the upper Cretaceous, near Martinez, obtained 

 by Dr. John C. Merriam, there is a small tooth of a different 

 species of Hemipristis. The tooth is sub- 

 triangular, about as broad as high, the in- 

 ner edge convex, the outer nearly straight, 



Fig._7. Hemipristis w ith an incurved angle. The tip of the 



chieonis Jordan . Chico .,, -, ,. . _ 



. tooth is without denticles. On the inner 



(h'etaeeous near Mar- 1 



tine/., California. edge there are about twelve of these serra- 



