426 



REFERENCE TO PLATES. 



FIGURE. PAGE. 



7. Cylichna minuta = villiersi. P. Z. S., .... 312 



8. Cylichna brevissima Ad. Thes., 310 



9. Cylichna pygmsea Ad. The?., 319 



10. Cylichna concinna Ad. Thes., 309 



11. 12. Cylichna striata Hutt. Specimen, .... 319 



13. Atysutriculus Brocchi. F. & H 279 



14. Chelidonura adamsii Aug. P. Z. S. . . See Vol. XVI 



15. Tornatina inculta Gld. Specimen, . . . .188 



16. 17. Atys cylindrica Hebl. Anim. Evert., . . .262 

 18, 19. Micromelo eximiaDh. Moll. Keun., . . .393 

 20, 21. Micromelo undataBrug. Thes., . . . .392 

 22-24. Micromelo undata Brug. Specimens, . . . 392 

 25, 26. Micromelo guamensis Q. Voy. Uranie, . . . 392 



27. Diaphana debilisGld. Specimen, 281 



28. Diaphana hiemalis Conth. Specimen, .... 286 

 29-31. Diaphana ventricosa JefFr. Ann. Mag., . . . 284 

 32, 33. Diaphana lottre Bush. Bull. M. C. Z., . . . 281 



Plate 60. 



1-3. Retusa truncatula Brug. Meyer & Mob., . . . 204 



4. Retusa truncatula Brug. Moll. Reg. Arct., . . 204 



5, 6, 7. Retusa uitidula Sars. Moll. Reg. Arct., . . . 204 



8. Retusa umbilicata. Moll. Reg. Arct., .... 204 



9, 10. Volvula acuminuta Brug. M. Sars., .... 233 



11. VolvulabrevisPils. F. & H., 235 



12, 13. Volvula acuta Orb. Moll. Cuba, . . . .236 

 14, 15. Volvula corticata Beck. Moll. Reg. Arct., . . 291 



16. Volvula alba Brown. Moll. Reg. Arct 290 



17. Leucotina minuta Smith. P. Z. S., .... 171 



18. Tornatina voluta Q. Samarang, . . . . .181 



Plate 61. 



20, 21. Diaphana minuta Br. Moll. Reg. Arct., . . .280 



22. Diaphana expansa Sars. Moll. Reg. Arct., . . . 280 



23. Cvlichua cylindracea Penn. F. & H., . . . . 287 

 24-27. Cylichna alba Brown. Moll. Reg. Arct., . . .288 

 28-31, 38. Akera bullata Miill. Moll. Reg. Arct., . . 376 

 33-37, 39, 40. Scaphander lignarius L. Moll. Reg. Arct., . 244 

 32. Atys utriculus Brocchi. Moll. Reg. Arct., . . .262 



