Geological Papers. 



171 



Obtained by the writer. 

 Phacoides acutilineatus Conrad. 

 Venus (Chione) vespertina Conrad. 

 Venus (Chione) angustifrons Conrad. 

 Tellina albaria Conrad. 

 Mactra gibbsana Meek. 

 Dentalium substriatum Conrad. 



Polynices (Neverita) reclusiana Pe- 

 tit. 

 Polynices (Neverita) saxea Conrad. 

 Polynices (Lunatia?) olympidii n. s. 

 Cyrodes aff. dowelli White. 



Dolium petrosum Conrad. 

 Dolium biliratum Conrad. 

 Chrysodomus gettysburgensis n. s. 

 Purpura canaliculata Ducal. 



Obtained by Doctor Arnold. 

 Phacoides acutilineatus Conrad. 



Tellina sp. 



Dentalium substriatum Conrad. 

 Fusus sp. 



Marginella or Erato sp. 

 Natica sp. 



Perissolax sp. 



? Macrocystis cf. pyrifera?. 



List of fossils from the sandston 

 Obtained by the writer. 

 Solemya ventricosa Conrad. 



Nucula (Acila) castrensis Hinds. 

 Nucula (Acila) gettysburgensis n. s. 

 Phacoides acutilineatus Conrad. 



Venus (Chione) mathewsonii Gabb. 

 Venus (Chione) temblorensis Ander- 

 son. 

 Pellina albaria Conrad. 



Mactra gibbsana Meek. 

 Dentalium substriatum Conrad. 



Polynices (Neverita) reclusiana Petit. 

 Polynices (Neverita) saxea Conrad. 

 Polynices (Lunatia?) olympidii n. s. 

 Trochita inornata Gabb. 

 Olivella pedroana Conrad. 



? Macrocystis cf. pyrifera?. 



Aturia cf. ziczac Sowerby. 



le (upper) horizon of Gettysburg; 



Obtained by Doctor Arnold. 

 Solemya rubroradiata Conrad. 

 Leda sp. 



Nucula sp. 



Phacoides acutilineatus Conrad. 



Cytherea cf. vespertina Conrad. 



Tellina (Angulus) sp. 



Thracia cf . trapezoides Conrad. 



Cylichna petrosa Conrad. 

 Dolium petrosum Conrad. 

 Fusus sp. 

 Natica sp. 



Perissolax (?) sp. 

 Pleurotoma sp. 

 Scala sp. 



