EXPLANATION OF PLATE XI. 
ROSTELLITES NASUTUS Gabb (p. 86). 
Figs. 1,2. Two views of Mr. Gabb’s type from the collection of the Acad. Nat. Sci., Phila. 
ROSTELLITES ANGULATUS Whitf. (p. 88). 
3,4. Two views of a cast showing the flattening of | the body volution. Acad. Nat. Sci.,Phila. 
ROSTELLITES TEXTURATUS Whitt. (p. 88). 
5,6. Views of two individuals, one from Holmdel, the other from Freehold, New Jersey, showing 
difference in surface markings. 
TURRICULA LEDA Whitf. (p. 93). 
7. View of the cast used in description. 
TURRICULA REILEYI 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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