132 CATALOGUE OF THE MOLLUSCA 
ways on a limestone soil ; local, but generally abundant where it 
does occur ; plentiful near Sunderland, and at Bamborough. 
27. H. EricEtorum, Linn. 
Helix ericetorum, Gray, Turt. Man. 163, t. 4, f. 37. 
On banks and dry pastures near the sea, not uncommon. Most 
plentiful on limestone. 
27. BULIMUS, Bruguiére. 
1. B. opscurus, Jill. 
Bulimus obscurus, Gray, Turt. Man. 183, t. 6, f. 63. 
Under stones in old quarries and in woods, frequent, but more 
plentiful on a limestone soil. 
28. ZUA, Gray. 
1. Z. tusrica, Mull. 
Bulimus lubricus, Drap. Hist. Moll. 75, t. 4, f. 24. 
Zua lubrica, Gray, Turt. Man. 188, t. 6, f. 65. 
In moss and under stones, common. 
29. ACHATINA, Lamarck. 
1. A. actcuna, Aull. 
Achatina acicula, Gray, Turt. Man. 191, t. 6, f. 71. 
Rare. One specimen found alive in the gardens at Whitley 
House.—J. H. F. At the roots of an Ornithogalum in a gar- 
den at Darlington — Mr. W. Backhouse. In the rejectments of 
the river Tyne at Bywell—Mr. Benjamin Johnson, Jun. The 
shell occurs sometimes on the sands at Tynemouth, probably 
washed from the banks. 
30. AZECA, Fleming. 
1. A. tripEens, Wont. 
Helix (Heliomanes ) Goodalli, Fér. Tab. des Moll. No. 492, ter. 
Azeca tridens, Gray, Turt. Man. 189, t. 5, f. 52. 
On mossy banks in woods, rather local but generally plentiful 
where it does occur. Scotswood, Meldon, Stella, Tanfield, Castle 
Eden, and Middleton-one-Row. 'unstal Hope, Pallion.—Wr. 
R. Howse 
