1 ig CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Several forms in this fauna have not been previously reported 

 from any other localities except those of the Marysville Buttes 

 and Oroville South Table Mountain. These species are as fol- 

 lows: Chrysodomus martini, Cardium marysvillensis, Sipho- 

 nalia sutterensis, Caricella stormsiana, Surcula davisiana, and 

 Venericardia planicosta merriami, new subspecies. In addition 

 to these species, Ancilla (Oliverato) calif ornica, Tiirris 

 suturalis and Neverita glohosa, while not restricted to the 

 Siphonalia sutterensis Zone of the Tejon group of California, 

 are quite characteristic and abundant in this zone. The other 

 species, except the new ones listed, have a great range in the 

 Tejon of California and most of them are found throughout 

 its entire thickness. Amauropsis alveata, Rimella canalifera, 

 and Turritella uvasana, have not as yet been reported from the 

 Siphonalia sutterensis Zone of the Marysville Buttes. These 

 three species are very common forms in the portion of the 

 Tejon below the Siphonalia sutterensis Zone. The occurrence 

 of these forms along with the characteristic forms of the 

 Siphonalia sutterensis Zone determines the position of the 

 strata containing this fauna in reference to the faunal zones of 

 the Tejon group of California. The fauna seems to present a 

 stage of development between that of Zone 3 of the Diablo 

 region and the fauna of the Siphonalia sutterensis Zone of the 

 Marysville Buttes. The fauna obtained from the uppermost 

 portion of the Umpqua formation appears to be more closely 

 related to the Siphonalia sutterensis Zone than to the fauna of 

 Zone 3, and on this account, it is tentatively placed as the lower- 

 most portion of the Siphonalia sutterensis Zone. 



Locality 24 is situated on the east bank of the north fork of 

 the Umpqua. It is near the bend of the river, one-quarter of a 

 mile north of Glide postoffice. It is in the southwest quarter of 

 Sec. 18, T. 26 S., R. 3 W. 



Locality 25 is on the east bank of the Little River, and 

 underneath the bridge which crosses it at its mouth. It is near 

 the center of Sec. 19, T. 26 S., R. 3 W. 



