1913.] STRATIGRAPHY OF PACIFIC COAST OF AMERICA. 583 



The following fauna was obtained from the Seattle Monocline 

 and at Astoria, 



Partial List of Species in the Seattle Horizon of the Astoria Series (Middle 

 Oligocene) of Seattle District, Washington and at Astoria, Oregon. 



Oregon 



46 47 273 



Washington 



49 103 206 1 261 



Pelecypoda : 



Acila gellyshurgensis Rgn.^' 



Cardium lorenzoanum Arn 



Crenelle porlerensis Wvr.'' 



Limopsis nitens Conr.'i 



Macrocallista vespe/tina Conr." 



,Marcia oregonensis Conr.'^ 



Modiolus ynezianus Arn 



Mytilus sammatnishensis Wvr 



Nucula iownsendi Dall 



Panope generosa Gld.^- 



Pecten peckhami Gabb 



Pecten waylandi Arn.^i 



Phacoides acutilineatus Conr 



Solemya ventricosa Conr.'' 



Solen ciirtus Conr 



Spisula albaria Conr 



Tellina lorenzoensis Arn. {Macotna moliniana 



Dall)3i 



Tellina ohruta Conr 



Tellina oregonensis Conr 



Thracia trapezoidea Conr .' 



Thyasi/a bisecla Conr.^^ 



Venericardia castor Dall'' 



Yoldia impressa Conr 



Yoldia oregona Shum 



Gasteropoda: 



Crepidiila prcerupla Conr 



Eiidolium peirosum Conr 



Miopleionia indurate Conr.^'. . . 



Natica oregonensis Conr 



Turcicida washingtoniana DalF' . 

 Turritella newcomhei Mrm.''. . . . 



SCAPHOPODA : 



Dentalium conradi Dall 



Cephalopoda: 



Aturia angustata Conr 



Brachiopoda: 



Hetnilhyris astoriana Dall^i .... 



X X 

 X . . . 

 X ... 



X X 

 X ... 



...I X 

 1 



X j X 



X i X 



X '. . . 

 X '. . . 



X 



X 



X 

 X X 



Locality 46; ashy shales with limestone nodules, beach at foot of 46th 

 Street, Astoria, Oregon. (H. Hannibal.) 



^1 Species characteristic of this horizon. 

 3- Species still living. 



