Vor, IIT] SMITH—MIOCENE FOSSILS OF CALIFORNIA 169 
The tables of the occurrence and range of the Miocene spe- 
cies of California are based on a critical study of all the litera- 
ture, and a critical examination of extensive collections from 
all the Miocene localities in California. Of course the list is 
not complete, for there are many undescribed species in the 
collections of the U. S. National Museum, of the University of 
California, of the California Academy of Sciences, and of 
Stanford University. Also some species that are now put 
together may not be synonyms, and very certainly some that 
are now treated separately will eventually be merged. 
Further examination of better material will probably show 
that some of the Miocene species, now considered as identical 
with Recent forms, are different. And further collection will 
probably bring to light more Recent species in the Miocene 
faunas. But none of this will change materially the figures 
and percentages given. The numbers are too large, and the 
collections already made are too extensive for that to be the 
CASE sii) 
It is hoped that this list will be of use to students of Cali- 
fornian stratigraphy, for whom it was prepared. Each one 
can do something towards completing it, by adding new species 
as they are described, checking the occurrence of old species, 
correcting the synonymy, and inserting names that have been 
omitted. 
In the check-list the Temblor and Monterey faunas are 
entered separately as a matter of record, although they are 
certainly synchronous. The lower Pliocene faunas are merged 
under the name San Diego-Purisima for convenience of refer- 
ence; and the upper Pliocene is recorded under the name Santa 
Barbara, because it is by no means certain that the name Mer- 
ced, which has been used for the upper Pliocene, is applicable 
in southern California. The name Fernando, which has been 
extensively used in listing the faunas of southern California, 
is not applicable, for it has included faunas from Leas Plio- 
cene to middle Quaternary in age. 
