1921] Merriam: Palaeontological Besearch on the Pacific Coast 243 



at Stanford University, University of California, as geologist with 

 the Southern Pacific Company, through the California Academy 

 of Sciences, and later as an independent investigator. Anderson's 

 papers on the Cretaceous deposits of the Pacific Coast, published 

 through the California Academy of Sciences in 1902, marked an 

 advance in the development of our knowledge of this fauna on the 

 "West Coast. His papers on the faunas of the middle and later Ter- 

 tiary, and covering important phases of this life on both eastern 

 and western sides of the San Joaquin A^alley, contri])uted much to our 

 knowledge of Cenozoic invertebrate palaeontology. Later studies in 

 cooperation with Bruce Martin added very significant data relative 

 to this field. 



A revision of the Eocene faunas of the California region was 

 begun by R. E. Dickerson in 1909 and was continued without 

 ^ interruption up to 1917. Tliis work began with the discovery of 

 definite evidence of separation of the lower Eocene or Martinez fauna 

 from the Chico Cretaceous and the later Eocene fauna represented 

 in the Marysville Buttes. A monograph on the Martinez fauna added 

 much to knowledge of this stage of the Eocene. Numerous shorter 

 papers have been issued on various aspects of the Eocene of the wliole 

 Pacific Coast region, the work on later Eocene culminating in a 

 review of the Tejon fauna. In the geologic sense one of the most 

 important contributions of this work lies in the presentation of 

 evidence of the Eocene age of the marine lone beds. Dickerson 's 

 studies of the Eocene greatly increase this fauna, and give a better 

 view of the geographical distribution of -its various phases. 



In 1913, E. L. Packard undertook a further study of the Cretaceous 

 of the Pacific Coast, commencing with investigation of an interesting 

 section in the Santa Ana Mountains of so^^thern California. The 

 work has added considerably to our knowledge of faunal range and 

 geographical distribution of the late Cretaceous marine invertebrates 

 of this coast. 



Dr. Packard has also carried on an intensive investigation of the 

 mactrine pelecypods of the West Coast begun under the direction of 

 Professor C. E. Weaver at the University of Washington. Tliis studj^ 

 has been one of the most difficult and most carefully conducted 

 investigations of a group of fossil invertebrates accomplished on the 

 Pacific Coast. 



The Miocene, especially in its later phases in California, lias been 

 the sub.ject of long-continued and intensive study by Bruce L. Clark, 



