Vol. 10, No. 18, pp. 293-326, 2 text figs., pis. 14-20 Issued November 8, 1917 



UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



FAUNA OF THE SANTA MARGARITA BEDS IN 

 THE NORTH COALINGA REGION 

 OF CALIFORNIA 



BY 



JORGEN O. NOMLAND 



CONTENTS 



PAGE 



Introduction 294 



Previous palaeontologic and geologic work 294 



Relation to other formations 296 



Lithologic section of the Santa Margarita northeast of Coalinga 298 



Fauna of the Santa Margarita northeast of Coalinga 299 



Other Santa Margarita localities compared 302 



Tejon Hills 302 



San Luis Quadrangle 302 



Salinas Valley 304 



Description of species 305 



Amiantis communis, n. sp 305 



Chione semiplicatus, n. sp 305 



Ostrea titan corrugata, n. var 306 



Pecten crassicardo biformatus, n. var 307 



Periploma clarki, n. sp 307 



Pinna bicuneata, n. sp 308 



Septifer margaritana, n. sp 308 



Acanthina (Monoeeras) noma, n. sp 309 



Fusinus fabulator, n. sp 309 



Purpura nanna, n. sp 310 



Teguia thea, n. sp 310 



Tegula varistriata, n. sp 311 



Trophon perelegans, n. sp 311 



Turritella freya, n. sp 312 



Turritella margaritana, n. sp 312 



