258 



University of California Publications in Geology [Vol. 7 



Voluta lawsoni, n.sp 284 



Turritella merriami, n.sp 284 



Olivula marj'svillensis, n.sp 286 



Ancilla (Oliverato) ealifornica Cooper ..' 286 



Arehitectonica weaveri, n.sp 287 



Caricella stormsiana, n.sp - 287 



Phos(f) martini, n.sp 288 



Calliostoma(?) arnoldi, n.sp 288 



Bittium longissimum Cooper 289 



Cardium dalli, n.sp 289 



Glyeimeris marysvillensis, n.sp 290 



Nucula cooperi, n.sp 290 



Tellina sutterensis, n.sp 290 



Trochocyathus ( ?) perrini, n.sp 291 



Introduction 



The Eocene fauna obtained from outcrops at Marysville 

 Buttes, California, has been known from the work of W. L. 

 Watts and J. G. Cooper of the California State Mining Bureau, 

 and Waldemar Lindgren and H. W. Turner of the U. S. Geo- 

 logical Survey. 



In the course of a study of the Eocene fauna of California, 

 small collections, the sifts of 0. W. Jasper and W. L. Watts, 

 representing the Eocene fauna from Marysville Buttes attracted 

 the writer's attention by their wonderful preservation, and by 

 the peculiar faunal phase represented. Most of the species in 

 these collections had not been recognized in other Eocene locali- 

 ties. In order to determine the zonal relations of this fauna, 

 the writer visited the Marysville Buttes in December, 1911, to 

 collect for the Department of Palaeontology of the University 

 of California. The writer is particularly indebted for many 

 valuable suggestions to Professor J. C. Merriam, under whose 

 supervision this work was undertaken. 



Review of Literature 

 The Eocene of Marysville Buttes was first described by W. L. 

 Watts 1 who referred to it using the name "Cretaceous B," in 

 the sense in which it had been used by Gabb. 2 



1 Watts, W. L., The Gas and Petroleum Yielding Formations of the 

 Central Valley of California. Bull. No. 3, California State Mining Bureau. 

 Aug., 1894, pp. 9-10. 



2 Gabb, W. M., Geological Survey of California, Palaeontology, vol. 1, 

 preface, p. 19, 1864. 



