Figs. 
EXPLANATION OF PLATE XLII. 
AMMONITES VANUXEMI Morton (p. 253). 
1, 2. Lateral and dorsal views of Dr. Morton’s type. 
3,4. Profile and lateral views of a larger specimen from the collection of the Am. Mus. Nat. 
History. j 
5. An enlarged outline (2x) of a septum from the outer portion of the last specimen. 
AMMONITES DELAWARENSIS Morton (p. 252). 
6,7. Lateral and dorsal views of a small specimen, showing the narrow volution in strong 
contrast with Fig. 4. 
8. Lateral view of a larger specimen. Both are from the Acad. Nat. Sciences collection. | 
9. Diagram, natural size, of the species from the specimen ES iap on Pl. xii, and showing 
strong contrast with Fig. 5, 
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