226 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



SUPPLEMENTARY DATA BEARING ON THE COMPOSITION AND AGE OF THE 

 THOUSAND CREEK PLIOCENE FAUNA 



BY JOHN C. MEERIAM, CHESTER STOCK, AND E. M. BUTTERWORTH 



(Alstract) 



The material obtained by a recent expedition to the Thousand Creek Plio- 

 cene deposits of Nevada had made possible a more minute analysis of the 

 faunal relations of these beds. 



CLIMATIC RELATIONS OF THE TERTIARY OF THE WEST COAST 

 BY JAMES PERRIN SMITH 



{Atstract) 



An exhibit was made of columnar sections from Eocene to Recent in five 

 climatic zones from Panama to Alaska, sho\ving the actual specimens charac- 

 teristic of the climatic zones, as well as of the geologic horizons. A chart was 

 also exhibited, showing the stratigraphic relationships of the faunas and the 

 shifting of the isotherms in geologic time. 



RECENT ADDITIONS TO OUR KNOWLEDGE OF CALIFORNIA CENOZOIC 



ECHINOIDS 



BY W. S. W. KEW 



(Abstract) 



The large collections of California echinoids acquired during the past few 

 years permit a more accurate determination of the geologic range of genera 

 and species. The number of species is greatly increased and the status of the 

 known forms more satisfactorily determined. Prior to the year 1913 thirty- 

 one species of echinoids and stelleroids were described ; since then twenty-one 

 additional forms have been added to this list. Undescribed forms in the col- 

 lections of California institutions will increase the number at least 60 per cent. 

 The geologic range of some of the more important genera on the Pacific coast, 

 including also the undescribed species, is as follows: Oidaris, Eocene, with 

 the exception of one species in the Oligocene and one in the Pliocene ; Strongij- 

 locentrotus, Pleistocene and Recent ; Scutella, mainly throughout the Miocene, 

 with fragmentary specimens from the Eocene ; Dcndrastcr, Pliocene, with the 

 exception of Dendraster excenPricus, which is living, and Astrodapsis, confined 

 to the Upper Miocene and Lower Pliocene. 



STRUCTURE OF THE PES IN MYLODON HARLANI AND ITS BEARING ON THE 

 PROBLEM OF SUPPOSED HUMAN ORIGIN OF FOOTPRINTS OCCURRING NEAR 

 CARSON, NEVADA 



BY CHESTER STOCK 



(Abstract) 



In the restoration of the pes of Mylodon harlani, based on the material from 

 Rancho La Brea, the second and third phalanges of digit 3 are identified with 



