MOLLUSCA OF INDIA. 45 



EXPLANATION OF PLATE LXVIII. 



Cyclophorus {Natalia) wahlbergi, Benson. Natal. 



Fig. L Animal viewed from right side, (5", X 4. 



1 a. Ditto, view from front and above, showing position of the male organ 



and aual orifice, X 4. 

 1 b. Ditto, front view of head, showing form of mouth, X 4. 

 1 c. Ditto, scar of the operculum, x4. 



1 d. Ditto, free end of the male organ, as seen on slide with transmitted 



light, X 12-4. 



2. Operculum, exterior side, X 2'5. 



2 a. Ditto, side view, posterior side to right hand, X 2"0. 



3. Buccal plates, X 8. p., posterior side ; a:r., anterior right side. 



3 a. Buccal portion showing the platelets, X 275. 



3 b. Buccal portion near the central edge, where the rows of platelets are 

 given off, X 275. 



4. Kadula, X 163. 

 4ff. Ditto, X 163. 



Cyclophorus (Cyclohelix) crocaius, Born. Andaman Islands. 



Fig. 5. Animal, right side, showing position of the penis, X 4. 



5 a. Ditto, from left side, X 4. 



5 b. The scar of the removed operculum, X 4. 

 f). Operculum, exterior side, X 2"5. 



6 a. Ditto, side view, inner side to right, X 4. 



7. Buccal mass and salivary glands, X 4. 



8. Eadula, X 58. 



o., operculum ; P., male organ; An.ap., sxizX aperture; t., tentacula; /.;"., left 

 tentaculum ; 6.P., base of male organ ; r.m., retractor muscle ; sal.gld., 

 salivary gland. 



EXPLANATION OF PLATE LXIX. 



F'ig. 1, 1 3. Pupina arula, Bs., from type in Benson collection, Cam- 



bridge, X 4. Burmah. 



2, 2 a, 2 h. blanfordi, Theob., from supposed type in British 



Museum, X 8. Burmah. 



3, 3 a, 3^, 3 c. pegucnsis, Bs., X 4. Kamah, Pegu. 



3d. , operculum, X 12'4; underside, X 124. 



4, 4 a, 4 b. limitaneu», G.-A. Eastern Shan Plateau. 



5, 5 a. tongupensis, G.-A., x 8. Arakan HiUs. 



6, 6 a. artata, x 8. Moulmain. 



6 6. , another specimen, viewed from left side, X 8. 



Moulmain. 



7, hmgcrfordi, X 4. Hsaddenkoo, Tenasserim. 



7 a. • , aperture, X 8. 



8, nicobarica, X 8. Andaman, 



PAET VII. 



