OF NORTHUMBERLAND AND DURHAM. 41 



In wet moss in woods, rather rare. Heaton Dean, Tanfield, 

 Ravensworth, Gibside, and Stella. 

 7. V. PUSILLA, Miill. 



Vertigo pusilla, Gray, Turt. Man. 205, t. 7. f. 86. 



In damp moss in woods, rather rare. Tanfield. — A. H. 

 Near Crowhall Mill. — J/r. J. Thompson. 



Family. Cyclostomid^, Gray. 

 35. ACME, Hartmann. 



1. A. LINEATA, Drap. 



Auricula lineata, Drap. 57, t. 3, f. 20, 21. 

 Acmefusca, Gray, Turt. Man. 223, t. 6, f. 66. 



In wet moss, Castle Eden Dean, rare. 



The Abbe 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 

 Turho fuscus, but as Walker does not use any specific name, that 

 oifuscus can only date from Montagu, and consequently does 

 not take precedence of Draparnaud's. 



Family. Auriculid^e, Gray. 



36. CARYCHIUM, iluller. 

 1. C. MINIMUM, If nil. 



Carychium yninimum, Gray, Turt. Man. 221, t. 7, f. 7 7. 

 Among moss and decayed leaves in woods, &c., common. 



37. CONOVULUS, Lamarck. 

 1. C. denticulatus, Mo?it. 



Conovulus denticulatus, Gray, Turt. Man. 225, t. 12, f. 144. 

 Var. Valuta ringens, Turt. Conch. Diet. 250. 



Carychium personatiim, Mich. Comp. Drap. 73, t. 15, 

 f. 42, 43. 



