UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 8, No. 20, pp. 365-376, pis. 39-40 Issued March 2, 1915 



TERTIARY ECHINOIDS 

 FROM THE SAN PABLO GROUP 

 OF MIDDLE CALIFORNIA 



BY 



WILLIAM S. W. KEW 



CONTENTS 



PAGE 



Introduction 365 



Stratigraphic Range of Species 366 



Relationships of Species 367 



Description of Species 367 



Scutella gabbi Remond 367 



Scutella gabbi Remond, n. var. tennis 368 



Scutella pabloensis, n. sp 369 



Astrodapsis tumidus Remond 370 



Astrodapsis tumidus, Remond, n. subsp. cierboensis 370 



Astrodapsis altus, n. sp 371 



Astrodapsis whitneyi Remond 372 



Introduction 



The fauna of the Upper Miocene San Pablo group of Middle Cali- 

 fornia includes the largest number of echinoids found in any division 

 of the Tertiary of the Pacific Coast. During the last few years, the De- 

 partment of Palaeontology of the University of California has made 

 extensive collections in this formation, and has obtained a great 

 abundance of echinoid material. It is the object of this paper to pre- 

 sent descriptions of the new species and to list those previously de- 

 scribed. The vertical range of the species is given, together with their 

 occurrence in other formations in California. 



The writer wishes to acknowledge his indebtedness to Dr. J. C. 

 Merriam, Professor of Palaeontology, and to Dr. B. L. Clark, Instruc- 

 tor in Palaeontology, at the University of California, for their valuable 

 co-operation in the preparation of this paper. 



