38 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, Bruguiere. 



1. B. OBSCURUS, MiiU. 



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. LUBRICA, Hull. 



Bulimus luhi'icus, Drap. Hist. Moll. 75, t. 4, f 24, 

 Zua luhrica, Gray, Turt. Man. 188, t. 6, f. 65. 

 In moss and under stones, common. 



29. ACHATINA, Lamarck. 



1. A. ACICULA, Ifiill. 



Achatina acicida, Gray, Turt. Man. 191, t. 6, £ 71. 

 Rare. One specimen found alive in the gardens at Whitley 

 House. — /. H. F. At the roots of an Ornithogalimi 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. KZECK, Fleming. 



1. A. TRiDENS, Mont. 



Helix (Heliomanes) Goodalli, Fer.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. Tunstal Hope, Pallion. — Mr. 

 R. Howse 



