LAMELLIBEANCHIATA OF THE LOWER MAELS. 193 



as in those left under the original name Clavagella, although I cannot see 

 where the line of separation between the two sections can be drawn. I 

 should prefer to call them all Clavagella. 



Formation and locality. — In the Lower Marls at Walnford, Monmouth 

 County, and near New Egypt, New Jersey. Dr. Morton's specimen was 

 collected at Arneytown, N. J., by Mr. Conrad, and it has also been recog- 

 nized at Prairie Bluif, Alabama. Mr. Gabb speaks of it as occurring at 

 Mount Holly, New Jersey. 



4418 MON 9 13 



