FOSSILS OF THE CLALLAM FORMATION 463 



the finer sediments of the series, at least two distinct horizons being 

 recognized. 



At least five recognizable faunas have so far been found in the Clallam 

 formation. The oldest comes from the lowest clay-shales of the series and 

 is characterized by such species as the following: 



Fossils from the Clallam formation 

 List of fossils from the lower clay-shale (Oligocene) 



Leda sp. Dentalium siibstriatum Conrad. 



Pecten clallamensis Arnold. Fusus sp. 



Pecten waylandi Arnold. Marginella or Erato sp. 



Pliacoides acutilineatus Conrad. Natica. sp. 



Nucula sp. Perissolax sp. 



Solemya rubroradiata Conrad. Aturia cf. ziczac Sowerby. 



Tellina sp. 



List of fossils from the second horizon or massive sandstone 



Above the c^-shale horizon is a series of medium bedded to fine mas- 

 sive sandstones in which are found fauna apparently transitional from 

 the clay-shales to the coarse sandstones. This sandstone horizon has 

 yielded the following fauna : 



Cytherea cf. vespertina Conrad. Cylichna petrosa Conrad. 



Leda sp. Dolium petrosum Conrad. 



Nucula sp. Fusus sp. 



Pliacoides acutilineatus Conrad. Natica sp. 



Solemya rubroradiata Conrad. Perissolax (?) sp. 



Tellina (Angulus) sp. Pleurotoma sp. 



Thracia cf. trapezoides Conrad. Scala sp. 



List of fossils from the third horizon or Miocene sandstone 



Still a third fauna, later than the last, is represented by the following 

 species found immediately east of Clallam bay: 



Area sp. Tellina arctata Conrad. 



Chione (aff.) teniblorensis Anderson. Fusus oregonensis Conrad. 



Cytherea cf. vespertina Conrad. Natica sp. 



Pecten fucanus Dall. Sigaretus scopulosus Conrad. 

 Pecten propatulus Conrad. 



