UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 6, No. 4, pp. 79-87 Issued February 4, 1911 



ADDITIONS TO THE AVIFAUNA 



OF THE 



PLEISTOCENE DEPOSITS 



AT 



FOSSIL LAKE, OREGON 



BY 



LOYB HOLMES MILLEE. 



CONTENTS. 



Introduction 79 



Source and nature of the material 80 



Previous knowledge of the fossil avifauna 81 



List of species known from Fossil Lake 82 



Description of species 83 



.ZEchmophorus lucasi, n. sp 83 



Erismatura jamaicensis (Gmelin) 86 



Circus hudsonius (Linnaeus) 86 



INTRODUCTION. 



The horizon designated as the Equus Beds in the Fossil Lake 1 

 region of Oregon has been known to palaeontologists for many 

 years, and the field has been extensively worked by Marsh, Cope, 

 Condon, Sternberg and the University of California. The ma- 

 terial representing the bird group has been so critically examined ( 

 by both Cope and Schuffeldt, that it would seem as though our 

 knowledge of the Pleistocene avifauna of that region bore little 

 chance of improvement. It is the object of the present paper to 

 record certain additions to the known list of species that have 

 recently come to light. 



i Generally known in the literature as ' ' Silver Lake ' '. Fossil Lake 

 is a small body of water about twenty miles north-east of Silver Lake. 



