EXPLANATION OF PLATE XLVII. 
BELEMNITELLA AMERICANA Morton (p. 280). 
Fias. 1,2. Views of the opposite sides of a small individual figured by Dr. Morton in his Synopsis 
under the name Belemnites subfusiformis. Acad. Nat. Sci., Phila. 
3. View of a heavy thickened specimen much rounded at the base. Rutgers College. 
4, A smaller specimen, showing the mucronation at the base. Rutgers Cullege. 
5,6. Two views of a very large individual presenting the usual form. Rutgers Coilege. 
7. View of part of the same after having been split longitudinally. 
8. View of a small specimen imperfect at the lower end, but preserving the walls of the 
cavity out to a thin margin. Am. Mus. Nat. History. 
9. View of the filling of the alveolar cavity of the last specimen, showing the thickened ridge 
on the cast on the side opposite to the slit in the stylet. 
10,11. Views‘of a phragmocone showing the septa) markings. Rutgers College. 
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