TAB. XL 



Fig. 



1. Bulimus politus. No. 24, p. 73. 



a. Front view, natural size. 



b. Ditto, magnified. 



c. Back view, natural size. 



d. Ditto, magnified. 



2. Bulimus ellipticus. No. 23, p. 72. 



a. Front view 



b. Side view. 



c. Fragment of a large specimen in the Brit. Mus. 



d. Side view of a cast. 



e. Side view of a cast, young. 



/. Fragment from Primrose Hill. {B. tenuistriatus, G. Sow.) 



3. Succinea imperspicua. No. 29. p. 81. 



a. Front view, natural size. 



b. Ditto, magnified. 



c. Back view, natural size. 



d. Ditto, magnified. 



4. Helix sub-labyrinthica. No. 21, p. 69. 



a. Front view of a cast, natural size. 



b. Impression of the whorl, magnified. 



c. Back view, magnified. 



5. Helix Headonensis. No. 22, p. 70. 



a. Upper surface of a cast. Natural size. 



b. Ditto, ditto, magnified. 



c. Portion of the whorl of ditto, magnified. 



d. Front view of ditto, magnified. 



6. Clausilia striatula. No. 28, p. 79. 



a. Front view of a cast of a young shell, nat. size. 



b. Ditto ditto, magnified. 



c. Front view of cast with parts of the shell preserved, nat. size. 



d. Ditto, ditto, magnified. 



e and g. Views of casts of adult shells, showing the aperture, nat. size. 

 / and h. Ditto ditto, magnified. 



7. Pupa perdendata. No. 26, p. 77. 



a. Back view of a cast (shell partly preserved), natural size. 



b. Ditto ditto, magnified. 



c. Front view of ditto, natural size. 



d. Ditto ditto, magnified. 



e. Impression of the whorls in the matrix, magnified. 



