PLATE LVI. 
PAGE 
Pigs. 1, 2. TuRRiTELLA iNDENTA Conrad 233 
1. Ventral view. 3 miles south of Chesapeake Beach. 
2. Ventral view. Plum Point. 
Fig. 3. TuRRiTELLA ^QUiSTRiATA Conrad 234 
3. Ventral view. Church Hill. 
Figs. 4-9. TuBBiTELLA PLEBEiA Say 234 
4. Ventral view of typical form. St. Mary's River. 
5. Ventral view of typical form. Jones Wharf. 
G. Specimen from Jones Wharf showing var. A. 
7. Specimen from Plum Point showing var. B. 
S. Specimen from same locality showing var. A. 
9. Specimen of var. octonaria. Dover Bridge. 
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