340 Jordan — Sharks 7 Teeth from California. 



than the others, the interior edge quite flat and the exte- 

 rior quite convex. The tooth is serrulate to the tip, the 

 serrge coarser than in the larger examples, all bluntish 

 and about eighty to be counted, twenty or more appar- 

 ently broken off. 



This tooth is plainly identical with the type of Carcha- 

 rodon banneri but it may be different from the two larger 

 examples. Perhaps the distinction is due to its being less 

 worn and from a different part of the mouth. 



From Carcharodon megalodon Charlesworth, the giant 

 species of deposits along the Atlantic Coast, the present 

 form is plainly different as in C. megalodon, the serrse are 

 far larger and coarser. 



In life, the present species must have reached a length 

 of more than one hundred feet, as Carcharodon car- 

 charias, the living species of "Man-Eater," reaching a 

 length of thirty-five feet, has teeth barely an inch in 

 height. 



2. Carcharodox arnoldi Jordan (Carchorodon river si 



Jordan). 



In the same collection from Torrance is a specimen 

 which corresponds perfectly to the type of Carcharodon 

 river si Jordan, described by me on page 115, of the same 

 paper, from Pliocene deposits near Santa Monica. In 

 this example the crown is nearly two inches high, the 

 tooth narrowly triangular, nearly flat, and about as high 

 as broad at base. The denticles are coarse and blunt, the 

 total number being about 45 on each side. This species is 

 however very doubtfully distinct from Carcharias arnoldi 

 described by me (p. 113) from the Pliocene of Pescadero, 

 and since found in different deposits of the California 

 Miocene at Lompoc, in Kern County, and elsewhere. 



3. Carcharodon carcharias (L.). 



From the same deposits at Torrance, but possibly at a 

 higher level I have a small tooth which must belong to the 

 living "Man-Eater, " still extant on the California Coast. 

 It is an inch in elevation, 1% in slant height, narrower 

 than C. arnoldi and with the edges more flexuous. The 



