230 University of California Publications in Geology [Vol. 7 



Santa Margarita and Etchegoin faunas. The division line be- 

 tween them corresponds to the period of orogenic activity that 

 came on at the end of the Monterey Epoch. . . . This brings us 

 back almost to the standpoint of Lawson and Merriam, who have 

 proposed to call all the lower Miocene 'Monterey' and all the 

 upper Miocene 'San Pablo' " (pp. 162-163). In his lower 

 "major faunal division" Smith includes two subdivisions: 



'Monterey — Temblor faunas of the Contra Costa hills, Mt. 

 Hamilton Range, Black Mountain, Santa Lucia Range, 

 Coalinga region, Bakersfield region, Santa Ynez and Santa 



j Monica mountains, and Santa Ana Range 

 Vaqueros fauna, of the Santa Lucia Range, Black Mountain, 

 the Santa Monica and Santa Ynez mountains. 



These two faunal subdivisions as judged from the faunal 

 lists given correspond exactly to the faunal stages suggested by 

 Merriam in 1904: 



In regard to the Temblor, Smith say s : "In the check-list 

 the Temblor and Monterey faunas are entered separately as a 

 matter of record, although they are certainly synchronous" 

 (p. 169). As to the Vaqueros, "the lowest horizon of the Mio- 

 cene has been called by Merriam the zone of Turritclla hoffmanni 

 (=TurriteUa inezana) ; it may eventually be found to be the 

 inshore equivalent of the deep-water San Lorenzo Oligocene, with 

 which it has a few species in common" (p. 165). 



AVhile Smith uses the well known terms Vaqueros and Mon- 

 terey — and without auy particular explanation of a changed 

 definition — he does not use them in the- sense in which anyone 

 else has previously used them. It is quite probable that he 

 is right in his division of the littoral fauna of the Monterey 

 series into the two zones proposed, but he has applied to them 

 two formation names — names for formations which do not really 



FAUX A L ZONES 



Merriam, 1904 



Smith, 1912 



