EXPLANATION OF PLATE XXxX. 
Vo.tuta Leia Whitf. (p. 207). 
Fics. 1,2. Two views of avery perfect cast, but slightly distorted from compression. 
3. The outer volution of the same specimen lifted to show imprints of columellar folds. 
VOLUTA PERELEVATA Whitf. (p. 208). 
4,5. Two views of a fragment, the latter having the lower part of the last volution removed 
so as to expose the imprints of columellar folds. Collection Am. Mus, Nat. Hist., New 
York City. 
6. View of another fragment. 
VOLUTILITHES CANCELLATUS Whitf. (p. 213). 
7-10. Views of four different individuals showing the diversity of surface features, Fig. 9 
showing columellar folds; this and Fig. 7 are from specimens in Am. Mus. Nat. Hist., 
New York City. 
VOLUTILITHES Sayana Conrad (p. 212). 
11-14. Views of four specimens showing diversity of form and surface. Figs. 11, 12 are from the 
collection Am. Mus. Nat. Hist., New York City, the latter showing columellar folds. 
15. View of a specimen from Claiborne, Alabama, showing a medium of features. Am. Mus. 
Nat. Hist., New York City. 
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