102 



University of California Publications. 



[Geology 



In the collection of Mr. Anderson from Barker Ranch and 

 from near Oil City in Kern County are about thirty specimens of 

 this species ; some minute, others reaching a length of two-thirds 

 of an inch. The largest tooth is sharp, subterete, and somewhat 



Fig. 4. 



a. Galeus (syopterus?). Pliocene of Temescal Canon. 



b. Galeocerdo productus? Miocene of Kern County, California. 



c. Galeocerdo productus? Miocene of Kern County, California. 



d. Chiloseyllium? Miocene of Kern County, California. 



c. Galeocerdo productus. Miocene of Kern County, California. 



flexuous, convex on the outer margin, with about twenty -five very 

 fine crenulations, the tip entire. On the inner margin the tooth 

 is deeply notched, so that the outline presents nearly a right angle 

 with its base, both basal part and vertical margin being fully 

 crenulate, having about ten fine crenulations. The width of the 

 base is about equal to the height of the tooth. Some of the outer 

 teeth are almost entire. Some of these have the tooth reduced to 

 a rather slender hook, not serrated, and on a very broad root. 

 The peculiar twist of the tooth in this species is characteristic. 



Another tooth of this genus from near Oil City has the basal 

 crenulations or denticles on the root very strong, while those on 

 the outer margin are scarcely evident. The tooth is low and very 

 broad, the tip strongly turned outward. It resembles Galeocerdo 

 aduncus more closely than the others, called G. productus. It is 

 probably of the same species as those called G. productus. 



