20 



Sciences, obtained by Dr. F. M. Anderson from the lower Miocene 

 of Kern County, the locality listed as 543, the west side of a high hill 

 three miles northwest of the village of Bena. 



It is obviously the tooth of a HETERODONTID (CESTRACIONT) shark 

 but it differs from HETERODONTUS and related genera by the entire 

 absence of ridges and furrows on the tooth, which evidently comes from 

 the middle of the side of the jaw. 



The genus WODNIKA Miinster is defined as having the teeth all 

 large and adapted for crushing, the coronal surface smooth and gently 

 rounded. The latter character applies to the specimen before us, but 

 we are not sure as to other teeth. 



WODNIKA ALTHAUSI Miinster comes from the upper Permian 

 (Kupferschiefer) of Reichelsdorf, Germany. 



It is very likely that additional material may place this specimen 

 in some other genus. 



The specific name OCOY^E recalls the locality (Ocoya Creek) in 

 Kern County from which Dr. Blake obtained for Agassiz the first 

 examples of California Miocene sharks. 



Family HEXANCHID^. 

 2. Heptranchias andersoni. 



Of Kern Miocene. Perhaps the same as HEPTRANCHIAS PRIMIGENIUS 

 (Agassiz) of Europe. 



Family GALEORHINID^E. 



3. Triakis beali Jordan, new species. 

 (Plate VII, fig. G) 



The type, a single tooth in the collections of the California Academy, 

 from the Kern River Miocene, is quite unique. It is triangular, almost 

 equilateral, the sides slightly convex. It is nearly erect, but notched on 

 the outer margin, beyond which is a strong denticle, narrower than the 

 main tooth, but similar in form and about two-fifths its height. The 

 main tooth is finely serrate on both edges; the denticle is entire. It is 

 probable that. one or more other denticles existed and have been broken 

 off, on the outer side of the tooth, but there were none on the inner 

 side. The total height of the tooth is ten millimeters. The main tooth 

 from the base downward to the outer notch is five millimeters, the 

 diameter two and one-half. This tooth indicates relation to the species 

 of TRIAKIS, but its pertinence to that genus doubtful. 



The species is named for Carl Hugh Beal, a student who worked 

 with me on fossil sharks in 1912. 



