426 



REFERENCE TO PLATES. 



FIGURE. PAGE. 



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



8. Cylichna brevissima Ad. Thes., 310 



9. Cylichna pygmsea Ad. Thes., 319 



10. Cylichna concinna Ad. Thes., 309 



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



13. Atys utriculus 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 eximia Dh. Moll. Reun., . . .393 

 20, 21. Micromelo undata Brug. Thes., . . . .392 

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

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



27. Diaphana debilis Gld. Specimen, . '. . . .281 



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

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

 32, 33. Diaphana lotta? 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 nitidula Sars. Moll. Reg. Arct., . . . 204 



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



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



11. Volvula brevis Pils. 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. Cylichna cylindracea Penn. F. & H., . . . . 287 

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

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

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

 32. Atys utriculus Brocchi. Moll. Reg. Arct., . . . 2b'2 



