i66 



CALIFORNIA ACADEMY OF SCIENCES [Proc. 30 Ser. 



the coal mines the basal portion of the Eocene is occupied 



by thin beds of conglomerate, sand, and coal-bearing sandy 



shale. The following stratigraphic section fairly represents 



the Eocene at the coal mines: 



ft. 



Kreyenhagen Shales 400 



Echinoderm conglomerate 8 



Carbonaceous sands 140 



Two fossil horizons are to be noted in this section: (a) 



that of the pebbly conglomerate containing species of 



Echinoderms; (b) that of the carbonaceous sands. The 



thin bed of conglomerate has afforded the following species : 



Cassidiilus californiciis n. sp. Spondylus carlosetisis n. sp. 



SciUella sp. A. Tellina sp. 



Echinoderms (genus not det.) Galenis excentricus Gabb 



Ostrea aviculiforniis n. sp. Turritella tivasaiia Gabb 



Cardiuni cooperi Gabb Terebratella sp. 



Mactra sp. Crustaceans (Cancer, etc.) 



Meretrix honii Gabb Nodules of barites 



Ostrea (2 sp.) 



From the sandy beds more closely connected with the 



coal and carbonaceous strata were obtained : 



Modiola ornata Gabb Ostrea idriaensis Gabb 



Meretrix uvasana Gabb Limatia horni Gabb 



Meretrix horni Gabb Nerita triangulata Gabb 



Cardium cooperi Gabb Neverita globosa Gabb 



Mactra sp. Galerus excentricus Gabb 



Area ( Barbatia ) inorsei Gabb Fusus niartinez Gabb 



Cardita sp. Turritelta pacheco'ensis Stanton 

 Placiianoniia inornata Gabb 



North of Los Gatos Creek a pebbly conglomerate, si.x to 



ten feet thick, near the top of the Kreyenhagen Shales, has 



been followed almost continuously for a distance of four 



miles. It has yielded the following species : 



Ostrea aviculiformis n. sp. Morio tiiberculatiis Gabb 



Cardita horni Gabb Turritella uvasana Gabb 



Dositiia sp. Turritelta pacheco'ensis Stanton 



Gari texta (?) Gabb Trochosmitia striata Gabb 



Cardiuni cooperi Gabb Ellipsosuiilia granulifera Gabb 



Pecten sp. Terebratella sp. 



Meretrix horni Gabb Echinoderms (2 sp. undet.) 



Ostrea (2 sp.) Sharks' teeth 



Spondylus carlosensis n. sp. Teleost. vertebrae 



Amauropsis alveata Gabb Nodules of barites 



