VINCENTOWN FORMATION. 169 



Locality 161. At Medford, along the creek Just west of the 

 town, the Vincentown limesand is exposed, and the following 

 species of fossils have been recognized : 



ECHINODERMATA. 



Pseudodiadema diatrema (Mort.) 

 Echinoid spines. 



VERMES. 



Serpula rotula (Mort.) 



BRYOZOA. 



Onychocella digitata ( Mort. ) 

 Retelea avails G. & H. 

 Several undetermined species. 



PELECYPODA. 



Polorthus tibialis (Mort.) 



Locality 171. On Mantua Creek, just below the mouth of 

 Bethel run, near Hurffville, the following species were collected 

 from the Vincentown limesand : 



BRYOZOA. 



Onychocella digitata (Mort.) 



PELECYPODA. 



Area quindecemradiata Gabb. 

 Gryphaeostreavomer (Mort.) 

 Polorthus tibialis (Mort.) 



Locality IJQ. This locality is situated about J4 mile up the 

 creek from the last, and has yielded the following species : 



VERMES. 



Serpula rotula (Mort.) 



BRYOZOA. 



Onychocella digitata (Mort.) 



