FAUNAL RELATIONSHIPS OF THE MEGANOS GROUP 157 
as that of his Siphonalia sutterensis zone were at the top of the 
Eocene in this general section, and used this as corroborative evi- 
dence in support of his belief that this zone belongs to the upper- 
most Eocene horizon known on the West Coast. At that particular 
locality these beds are in unconformable contact with beds of 
Lower Miocene age. Further stratigraphic work by Kew, however, 
has shown that to the west other beds come in between these 
Eocene beds of Aliso Canyon and the Lower Miocene, and not 
more than four miles from that locality nearly 3,500 feet of other 
strata are found between. These include beds of true Tejon 
age, together with a considerable thickness of land-laid beds which 
have generally been called the Sespe formation. This is the section 
already referred to, in which there is a marked unconformity 
between the Meganos and the Tejon. Thus mapping and faunal 
work in this region show conclusively that the Eocene beds of 
Aliso Canyon, correctly considered by Dickerson as representing 
his Siphonalia sutterensis zone, lie unconformably below beds 
which contain a typical Tejon fauna. 
FAUNA OF THE MEGANOS OF CALIFORNIA 
The following is a list of the described species from the different 
Eocene localities in California which are now believed to be of 
Meganos age. The list is as complete as can be made at the 
present time. The writer takes entire responsibility of the 
specific determinations. The fauna, as listed here, represents 
only a comparatively small part of the known fauna, since a very 
large proportion of the known Meganos species has not yet been 
described. When this fauna is more thoroughly worked up, the 
evidence for the correlation of the different sections here described 
will appear more conclusive. 
The general localities from which the species listed on pages 
158-59 have been obtained are indicated in the columns on the 
side, as follows: M., Marysville; T.M., Table Mountain; Mt.D., 
Mount Diablo; Coal., Coalinga; Ca., Camulos and Calabasas 
Quadrangles; T.T., Type Tejon. 
