EXPLANATION OF PLATE XLIL 
AMMONITES VANUXEMI Morton (p. 253). 
Figs. 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. | . 
o. 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 figured on Pl. xii, and showing 
strong contrast with Fig. 5, 
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