1913] Jordan-Beal: Supplementary Notes on Fossil Sharks 253 



indicated, may be a lateral tooth and the others may represent 

 different parts of the jaw. Possibly the name Carcharodon 

 rectus should include arnoldi and riversi. But Leriche seems to 

 regard C. rectus as the young of C. megalodon (= C. branneri) . 

 Any view of the case is at present a guess, one doubtful opinion 

 being set off against another. 



There are at least two fossil and one living species of 

 Carcharodon represented in the California fauna. These are 

 C. megalodon, G. arnoldi (including C. riversi?) and C. 

 carcharias. 



Family DALATIDAE 

 Genus Dalatias Rafinesque 

 (Scymnus Cuvier) 



20. Dalatias occidentalis (Agassiz). 



Miocene, Ocoya Creek, Oil City; Pliocene, Temescal 

 Canon. 



No new specimens of this species have been noted. 



Family ECHINORHINIDAE 

 Genus Echinorhinus Blainville 



21. Echinorhinus blakei Agassiz. 

 This species we have not seen. 



Family SQUATINIDAE 

 Genus Squatina Dumeril 



22. Squatina lerichei Jordan and Beal, new species. 



(Text fig. b) 



This species was not named, but was noted and figured (p. 

 119, fig. 4d) by the senior author as perhaps belonging to the 

 genus Chiloscyllium. Dr. Leriche suggests correctly that the 

 tooth in question is that of a species of Squatina. Additional 

 material is in the collection of Mr. Morrice. 



There are five very small teeth, narrow, triangular and nearly 

 erect, with the root very wide, its width nearly twice the height 



