OF NORTHUMBERLAND AND DURHAM. i 133 
31. CLAUSILIA, Draparnaud. 
1. C. pamrnata, Mont. 
Clausilia bidens, Gray, Turt. Man. 212, t. 5, f. 53. 
In woods, frequent. Mr. Hanley informs us that this is not 
the Turbo bidens of Linnzus, for which the name must be re- 
served. 
2. C. pupra, Drap. 
Clausilia dubia, Ald. in Newe. N. H. Trans. 11. 339; Gray, 
Turt. Man. 216, t. 12, f. 143. 
On rocks at West Boldon and Castle Eden. Tunstall Hill and 
Ryhope Dean.— Ur. Fe. Howse. 
3. C. rugosa, Drap. 
Clausilia rugosa, Drap. Hist. Moll. 73, t. 4, f. 19, 20. 
Clausilia nigricans, Gray, Turt. Man. 217, t. 5, f. 58. 
Var. More slender, and nearly smooth. 
Clausilia parvula, Turt. Man. Ist Ed. 74, f. 58 (not C. par- 
vula of continental authors). 
On stones, trees, &c., in woods and rocky places, not uncom- 
mon. The variety in Tanfield and Castle Eden Deans. 
32. BALZBA, Gray. 
1. B. perversa, Linn. 
Pupa fragilis, Drap. Hist. Moll. 68, t. 4, f. 4. 
Balea perversa, Gray, Turt. Man. 207, t. 6, f. 70. 
In moss and on old walls, not common. Castle Eden.—J. A. 
Ryhope Dean.—WU/r. RF. Howse. 
33. PUPA, Draparnaud. 
1. P. mareinata, Drap. 
Pupa marginata, Gray, Turt. Man. 196, t. 7, f£. 79. 
On the sea banks, frequent. 
2. P. umpruicata, Drap. 
Pupa umbilicata, Gray, Turt. Man. 193, t. 7, f. 78. 
Under stones in old quarries, woods, &c., common. 
3. P. Aneuica, Fér. 
Pupa Anglica, Gray, Turt. Man. 195, t. 7, f. 82. 
