EXPLANATION OF PLATE IV. 



Pigs. 1, 2, 3, 4, 7, 8, 9, 10, 11, 12, 21, 22.— Purpura (Polyptropa) 



Smithi, Brazier. 

 Pigs. 5, 6. — Helix (Patula) Unwini, Brazier, X 4. 

 Pigs. 13, 14, and 26.— Helix (Ehytida) Balli, Brazier, X 2. 

 Pigs. 15, 16. — Bythynella Eamsaii, Brazier, x 3. 

 Pigs. 17, 18. — Bythynella Whiteleggei, Brazier, x 4. 

 ]''igs. 19, 20.— Helix (Ehytida) Ledghirdi, Brazier. 

 Pigs. 23, 24, 25.— Helix (Ehytida) Whiteleggei, Brazier, x 2. 



Unless otherwise stated tlie figures are of the natural size. 



