TAB X. 



Fig. 



1. Cyclotus cinctus. No. 67, p. 117. 



a. Back view of specimen with the shell preserved. 



b. Front view of a cast. 



c. Back view of ditto. 



2. Helix globosa. No. 16, p. 63. 



a. Front view of a cast of a shell in an intermediate stage of growth. 



b. Front view of a cast of a young shell. 



c. Back view of an adult specimen with the shell partly preserved. 



d. Front view of ditto. 



3. Helix tropifera. No. 18, p. 64. 



a. Front view of a cast. 



b. Upper surface of ditto. 



c. Under surface of ditto. 



4. Melampus tridentatus. No. 65, p. 113. 



a. Front view. 



b. Back view 



5. Helix D'Urbani. No. 15, p. 62. 



a. Front view, nat. size. 



b. Ditto, magnified. 



c. Under surface, magnified. 



d. Upper surface „ 



6. Helix omphalus. No. 19, jo- 65. 



a. Front view, natural size. 



b. Ditto, magnified. 



c. Upper surface, ditto. 



d. Under surface, ditto. 



e. Portion of a whorl, magnified. 



