Vot. IIT] ANDERSON—FURTHER STRATIGRAPHIC STUDY 25 
Pecten crassicardo CONRAD Trophon (rel. T. ponderosum 
Pecten estrellanus CoNRAD GABB) 
Chione (rel. temblorensis Turritella sp. 
ANDERSON ) Natica sp. 
Mactra (Spisula) catilli- Surcula sp. 
formis DALL V olutilithes sp. 
Mytilus mathewsoni Gass Ficus pyriformis GABB (?) 
Agasoma kernianum CoorpER Tamiosoma gregaria CONRAD 
The same bed some miles to the east upon the Kreyenhagen 
ranch contained, in addition to several of the preceding forms, 
the following: 
Glycimeris generosa Goutp  Scutella gibbsi REMOoND 
Cardium, (cf. C. quadri- Trophon sp. 
genarium CONRAD) Natica sp. 
The forms most characteristic of the Coalinga beds in this 
part of the field are Agasoma kernianum, Scutella gibbsi, two 
species each of Astrodapsis and Trophon, and a Chione. 
These forms range through about 400 to 500 feet of sandy 
strata. Near the top of this zone there is often an abundance 
of Ostrea attwoodi and Scutella gibbsi. 
The general and to some extent the specific resemblances 
of this fauna to that of the Temblor beds is of course evident; 
but a study of the strata above and below this horizon war- 
rants the classification here proposed. The Miocene aspect 
of the fauna is unmistakable in the presence of such forms as 
Agasoma kernianum, Chione temblorensis, and the large 
species of Cardium, V olutilithes, etc. 
A few hundred feet above these beds are the typical beds 
of the succeeding series, while below them are the Monterey 
shales and the typical Temblor. 
The Coalinga beds have not as yet been followed continu- 
ously southward along the range beyond the Sunflower valley, 
though doubtless the task would not be impossible. They 
have not even been clearly recognized between the Sunflower 
valley and McKittrick. They form, however, a well defined 
and easily followed belt along the foothills west of the Midway 
district and to the south of Sunset. Northward this belt can 
be followed to a point a few miles north of Crocker Springs 
(Sec. 6, T. 31 S., R. 22 E.), and from thence it has been only 
