EXPLANATION OF PLATE XXX. 



VOLUTA Lelia Whitf. (p. 207). 



Figs. 1,'2. Two viewa of a very perfect cast, but slightly distorted from compression. 



■i. The outer volution of the same speoiiuea lifted to show imprints of colamellar folds. 



VOLUTA PEUKLBVATA 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 ttie imprints of colnmellar folds. Collection Am. Mus. Nat. Hist., New 

 Yorli City. 

 6. View of another fragment. 



VOLUTILITHES OANCELLATDS Whitf. (p. 213). 



7-10. Views of four difteront individuals showing the diversity of surface features, Fig. 9 

 showing colamellar folds; this and Fig. 7 are from specimens in Am. Mns. Nat. ?Iist., 

 New Yorlt City. 



VOLUTILITHES Sayana Conrad (p. 212). 



11-14. Views of four specimens showing diversity of form and surface. Figs. 11, 12 are from the 

 colloction Am. Mas. N it. 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 Yorli City. 



358 



