MARINE SEDIMENTS OF EASTERN OREGON 229 



hasty collection of fossils, from dark-colored sandstones that 

 were not unlikely the source of the earlier collections. The 

 sandstone contains several beds of conglomerate, composed 

 largely of pebbles of argillite and black chert. It dips gently 

 northwest and rests unconformably upon the Paleozoic lime- 

 stone mentioned above. Some of the fossils were obtained 

 within a few feet of the limestone, in a conglomerate that con- 

 tained an occasional pebble of the limestone. We did not have 

 time to learn much about the distribution of the sandstone, but 

 since the road up Crooked river had been entirely through 

 Tertiary sediments and lavas, and the road beyond was through 

 older rocks, it is not likely that the Chico covers much ground. 

 Our collection was referred to Mr. Stanton, to whom we are 

 indebted for the following list of species: 



Heiniaster califortticus Clark. Atithonya cultriformis Gabb. 



Exogyra parasitica Gabb. Meretrix variatis Gabb. 



Ostrea sp. Dosinia elevata Gabb. 



Gervillia sp. Tellina ? sp. 



Ittoceramus sp. Anatina guadrata Gabb. 



Trigonia evansana Meek. Pholadoniya sp. 



Homofnya conceiitrica Gabb. Acteonina californica Gabb. 



Dentalitim stramineuin Gabb. Trit07iium sp. 



Gyrodes expafisa Gabb. Fusus sp. 



Lunatia sp. lincvis sp. 



Amauropsis sp. Desmoceras dawsoni Whiteaves. 



Mr. Stanton says: 



The present collection is interesting from the fact that it contains a 

 considerable number of new species. Nearly all the forms that are only 

 generically determined appear to be undescribed. A larger collection of 

 fossils from this locality, with a description of the beds in which they 

 occur, is very desirable. 



It is evident that the same need exists for all the Paleozoic 



and Mesozoic rocks of eastern Oregon. 



Chester Washburne. 

 University of Oregon, 

 Eugene, Ore. 



