EXPLANATION OF PLATE XI. 



KOSTELLITBS NASUTU8 Gabb (p. 86). 



Figs. 1, 2. Two views of Mr. Gabb's type from the collection of the Acad. Nat. Sci., Phila. 



KOSTELLITES ANGULATUS Whitf. (p. 88). 



3, 4. Two views of a cast showing the flattening of the body volution. Acad. Nat. Sci., Phila. 



EOSTBLLITES TBXTURATUS Whitf. (p. 88). 



5, 6. Views of two individuals, one from Holmdel, the other from Freehold, New Jersey, showing 

 difference in surface markings. 



TURKICULA LBDA Whitf. (p. 93). 



7. View of the cast used in description. 



TuKRicuLA Eeileti Whitf. (p. 92). 



8. View of cast described, showing the impression of the extension of the spire above. 



• TURRICULA SCALARIFORMIS Whitf. (p. 95). 



9. The cast representing the two sets of surface markings. 

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