OF NORTHUMBERLAND AND DURHAM. 135 
In wet moss in woods, rather rare. Heaton Dean, Tanfield, 
Ravensworth, Gibside, and Stella. 
7. V. pustuua, Mull. 
Vertigo pusilla, Gray, Turt. Man. 205, t. 7. f. 86. 
In damp moss in woods, rather rare. Tanfield—aA. H. 
Near Crowhall Mill —Mr. J. Thompson. 
Famity. CycLostomipa, Cray. 
35, ACME, Hartmann. 
1, A. trneata, Drap. 
Auricula lineata, Drap. 57, t. 3, f. 20, 21. 
Acme fusca, Gray, Turt. Man. 223, t. 6, f. 66. 
In wet moss, Castle Eden Dean, rare. 
The Abbé Dupuy informs us that this species has an ex- 
tremely thin, transparent, subspiral operculum. This interesting 
discovery accounts for the very great resemblance of the animal 
to Cyclostoma, which we had previously remarked. The oper- 
culum must be very thin and inconspicuous, as it has hitherto 
been entirely overlooked. 
This is probably the species of Walker, which Montagu calls 
Turbo fuscus, but as Walker does not use any specific name, that 
of fuscus can only date from Montagu, and consequently does 
not take precedence of Draparnaud’s. 
Faminy. AURICULIDA, Gray. 
36. CARYCHIUM, Miiller. 
1. C. minimum, Jill. 
Carychium minimum, Gray, Turt. Man. 221, t. 7, £77. 
Among moss and decayed leaves in woods, &., common. 
37. CONOVULUS, Lamarck. 
1. C. penticunatus, Mont. 
Conovulus denticulatus, Gray, Turt. Man. 225, t. 12, f. 144. 
Var. Voluta ringens, Turt. Conch. Dict. 250. 
Carychium personatum, Mich. Comp. Drap. 73, t. 15, 
f, 42, 43. 
