The species contained in the part of the MS. missing, men- 
tioned at page 116, judging by the names in “The Classi- 
fication of the British Mollusca, by W. E, Leach, M.D., 1818,” 
published by Mr. Gray in the Annals and Magazine of Natural 
History, Oct. 1847, p. 268, are as follows :— 
7. PLANORBIS CONTORTUS. See Character in Synopsis at 
pe E12, 
Helix contorta, Mont. Test. Brit. 457. 
8. PLANORBIS VORTEX. See p. 112. 
Helix vortex, Mont. Test. Brit. 454. 
9. PLANORBIS SPIRORBIS. See p. 112. 
Helix spirorbis, Mont. Test. Brit. 498. 
1. HemirHaamus nitivvs, Leach, Ann. & Mag. Nat. Hist. 
xx. 269. 
Nautilus lacustris, Mont. Test. Brit. 191. 
FAMILY V. ANCYLID. 
Ancylide, Leach, Ann. § Mag. Nat. Hist. xx. 269. 
1. ANCYLUS LACUSTRIS. 
Patella lacustris, Mont. Test. Brit. 484. 
2. ANCYLUS FLUVIATILIS. 
Patella fluviatilis, Mont. Test. Brit. 482. 
