PLATE XII. 
Fig. 1. LUTRARIA solenoidea. 
LuTBARiA solenoidea. Lam. Syst. v. p. 468. 
Mactra hians, Mont. Test. Brit. p. 101. — Brown in Ency. Brit. vi. p. 410. 
Psammophila solenoides, Leach's MSS. 
Fig. 2. LUTRARIA elliptica. 
LuTRARiA elliptica. Lam. Syst. v. p. 468. 
Mactra Lutraria, Mont. Test. Brit. p. 99. — Brown in Ency. Brit. vi. p. 410. 
Fig. 3. LUTRARIA elliptica. 
Lutraria elliptica. Variety strong in proportion to its size, and in the Cabinet of John Trevelyan, Esq. at Wal- 
lington. 
Fig. 4. LUTRARIA compressa. 
Lutraria compressa. Lam. Syst. v. p. 469. 
Mactra compressa, Mont. Test. Brit. p. 96. 
