SECTION ALONG SEVERN RIVER 359 



Thickness 

 in feet 



Lophospira sp. 



Bellerophon sp. 



Euomphalus minor, 



Euomphalus rotundus. 



Euomphalopterus cf. tyrrelli. 



Euomphalopterus sp. 



Trochonema sp. 



Phanerotrema sp. 



Py euomphalus sp. 



Orthoceras sp. 



Actinoceras hearsti. 



Actinoceras sp. 



Trochoceras sp. 



Barrandeoceras sp. 



Phragmoceras whitneyi. 



Illcenus sp. 



Bronteus sp. 



Encrinurus sp. 



Leperditia hisingeri var. 

 6. Limestone, mostly non-dolomitized, in rather regular 

 layers, brachiopods common in the lower part and 

 corals and stromatoporoids more abundant in the 

 upper ; exposed in an arch near the mouth of Fawn 

 River 25 



Streptelasma pygmwum var. occidentale. 



Favosites hisingeri. 



Halysites catenulatus. 



Stropheodonta sp. 



Liospira sp. 



Stroparollus sp. 



Diaphorostoma perforata. 



Encrinurus cf. Iwvis. 

 A gap in exposure 

 Alexandrian series 



Severn River limestone 



5. Limestone, gray, fine grained, in rather even layers, 

 with numerous shells of Leperditia and other ostra- 

 cods in a zone near the top; exposed about one mile 

 above the mouth of Fawn River 35 



Clathrodictyon sp. 



Favosites favosus. 



Favosites hisingeri. 



Stropheodonta acanthoptera. 



Leptcena parvula. 



Orthis flahellites. 



Camarotcechia f winisTcensis. 



Cf. Whitfleldella julia. 



Ctenodonta suhovata. 



