UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 9, No. 14, pp. 199-214, plates 9-1 1 Issued February 24, 1916 



FAUNA FROM THE LOWER PLIOCENE AT 

 JACALITOS GREEK AND WALTHAM 

 CANYON, FRESNO COUNTY, 

 CALIFORNIA 



BY 



JOEGEN O. NOMLAND 



CONTENTS 



PAGE 



Introduction 199 



Historical Eeview 200 



Description of the Section on Jacalitos Creek 201 



Fauna of the Lower Pliocene at Jacalitos Creek and Waltham Creek 202 



Palaeontologic Determination of Age of the Jacalitos Beds 204 



Description of New Species 204 



Astralium arnoldi, n. sp 204 



Chrysodomus coalingensis, n. sp 205 



Fissuridea subelliptica, n. sp 205 



Murex perangulatus, n. sp 206 



Mytilus kewi, n. sp 206 



Natica (Neverita) orbicularis, n. sp 207 



Tivela trigonalis, n. sp 207 



Trophon magister, n. sp 207 



Turritella nova, n. sp 208 



Introduction 



On approaching the eastern foothills of the Diablo Range about 

 seven miles southeast of Coalinga, California, the stratified deposits 

 are found to consist chiefly of soft beds of the lower and middle 

 Pliocene. These strata comprise several thousand feet of much folded 

 and faulted sandstones and shales dipping away from the underlying 

 Cretaceous and Tertiary. In the mapping of this district by the 

 members of the United States Geological Survey the upper portion was 



