Fies. 1,2. 
3,4. 
5. 
6,7, 8. 
9, 10, 11. 
12, 13. 
14. 
388 
EXPLANATION OF PLATE XLV. 
TURRILITES PAUPER Whitf. (p. 268). 
Views of the opposite sides of the specimen described. 
Upper and lower views of the same specimen. 
Diagram of a septum, twice enlarged. This was accidentally shaded below instead of 
above the line as is done in case of other diagrams. : 
PTYCHOCERAS (SOLENOCERAS) ANNULIFER Morton (p. 273). 
Dorsal, ventral, and lateral views, twice enlarged, of the specimen used by Dr. Morton in 
the original description. Acad. Nat. Sci., Phila. 
HETEROCOCERAS CONRAD! Morton (p. 269). 
Profile, upper and lower views of Dr. Morton’s type. Acad. Nat. Sci., Phila. 
Lower and profile views of another specimen, being the deflected outer chamber only, the - 
elevated end showing evidences of the last septum. This is from the Atlantic High- 
lands of New Jersey, and is from Columbia College collection. 
A fragment of another outer chamber from the Acad. Nat. Sci., Phila, 
