AMPULLARIID&, ETC. TT 
SYNONYMY AND REFERENCE TO 
PLate 16. 
AMPULLARIID A. 
Fig. 
1. AMPULLARIA FLAGELLATA, Say. (Hald., p. 
10.) No. 2, 
NERITID 2. 
2. NERITELLA SHOWALTERI, Lea. Proc. Acad. 
Nat. Sci. Philad. 55, 1861. Jour. 
Acad, Nat. Sct, He %,5 ¥, 267, t.. 35, 
f. 78, 1863. 
Binney, L. & F. W. Shells, Part 3, p. 
106, 1865. No. I. 
VALVATIDA. 
3. VALVATA HUMERALIS, Say. (Hald., p. 9.) 
Binney, loc. cit. 14, 1865. No. 3 
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