GALEORHINHXE GALEOCERDO 21 



4. Galeocerdo productus Agassiz. 



Of Kern County. Perhaps identical with GALEOCERDO ADUNCUS 

 Agassiz of Europe. 



5. Galeorhinus hannibali Jordan and Beal. 



Of Kern County, Temescal Canon, Sierra Santa Monica, in Pliocene 

 rocks; the type from the Miocene of Kern County. 



6. Hemipristis heteropleurus Agassiz. 



From different localities in Kern County, Ocoya Creek, Oil City, 

 Barker's Ranch. Perhaps the same as HEMIPRISTIS SERRA of Europe. 



7. Carcharhinus antiquus (Agassiz). 

 From the Miocene of Kern County. 



Family CARCHARIID-ffi. 



8. Carcharias clavatus (Agassiz). 



Of Kern County Miocene. Perhaps the same as CARCHARIAS CUSPI- 

 DATUS (Agassiz), of the European Miocene and Oligocene. 



9. Carcharias morricei Jordan and Beal. 

 Of the Kern Miocene. 



Family LAMNID^. 



10. Isurus hastalis (Agassiz). 

 (Plate VII, figs. A, B, C, D, H) 

 (OXYRHINA PLANA Agassiz, OxYRHINA TUMULUS Agassiz, ISURUS 



SMITH i Jordan.) 



Numerous sharks' teeth of the genus ISURUS of various sizes and 

 forms were obtained in Orange County from Miocene deposits. They 

 seem to be referable to the European fossil shark described as OXYRHINA 

 HASTALIS Agassiz. 



Teeth like these have been described by Agassiz as OXYRHINA 

 PLANA and OXYRHINA TUMULUS from Kern County Miocene. These 

 were figured in Jordan's paper of 1907, being referred to the genus 

 ISURUS, a name older than OXYRHINA. Some of the teeth called ISURUS 

 TUMULUS came from near Santa Ana, in Orange County. Dr. Leriche 

 is probably right in regarding ISURUS TUMULUS as the lower teeth, 

 ISURUS PLANUS as the upper teeth, and ISURUS SMITHI as the sharp 

 median teeth of the same species, the widely distributed ISURUS HASTALIS 

 of Europe and of South America. In ISURUS the teeth from different 

 parts of the same jaw differ greatly, more than teeth of different species. 



