EXPLANATION OF PLATE III. 41 



both Bulimella and Achatinella in the shady valleys, with Apex on 

 the comparatively sunny ridges; and in the third, several abundant 

 species of Apex, and but one species of Bulimella, and but one of Acha- 

 tinella, both of these being extremely rare. 



NOTES ON THE SPECIES. 



FIG. i. Achatinella zonata (Gk.) S. From Pupukea. 

 FIG. 2. Achatinella albescens (Gk.) S. From Pupukea. 

 FIG. 3. Achatinella recta (Nwc.) S. From Kawailoa. 

 FIG. 4. Achatinella herbacea (Gk.) S. From Kawailoa. 

 FIG. 5. Achatinella delta (Gk.) S. From Wahiawa. 

 FIG. 6. Achatinella rhodorhaphe (Sm.) S. From Wahiawa. 

 FIG. 7. Achatinella pygmcea (Sm.) S. From Ewa. 

 FIG. 8. Achatinella ligata (Sm.) D. From Ewa. 

 FIG. 9. Achatinella analoga (Gk.) S. From Halawa. 

 FIG. 10. Achatinella colorata (Rv.) S. From Halawa. 

 FIG. ii. Achatinella adusta (Rv.) S. From Pauoa. 

 FIG. 12. Achatinella castanea (Rv.) S. From Pauoa. 

 FIG. 13. Achatinella olivacea (Rv.) S. From Pauoa. 

 FIG. 14. Achatinella dunkeri (Cuming) S. From Makiki. 

 FIG. 15. Achatinella producta (Rv.) D > S. From Makiki. 

 FIG. 16. Achatinella buddii (N'wc.) S. From Makiki. 

 FIG. 17. Achatinella johnsonii (Nwc.) S > D. From Manoa. 

 FIG. 1 8. Achatinella stewartii (Green) D > S. From Manoa. 

 FIG. 19. Achatinella juscozona (Sm.) S. From Manoa. 

 FIG. 20. Achatinella trilineata (Gk.) S. From Palolo. 



FIG. 2 1 . Achatinella varia (Gk.) S D . From Palolo. 



500 



FIG. 22. Achatinella bacca (Rv.) D. From Palolo. 



FIG. 23. Achatinella plumata (Gk.) S. From Waialae. 



FIG. 24. Achatinella diversa (Gk.) S. From Waialae. 



FIG. 25. Achatinella abbreviata (Rv.) D. From Waialae. 



EXPLANATION OF PLATE III. 



The purpose of this plate is to illustrate the variations and inter- 

 grading forms of closely related species of the Achatinellidae. The 25 

 shells figured in this plate are found in the northwestern portion of the 

 island of Oahu, and are regarded as belonging to four species, of which 

 Bulimella ovata Nwc. is presented under ten variations, five being of 

 the dextral form (see figs. 6 to 10), and five of the sinistral form (see 

 figs. 1 1 to 15). Of these figure 10 is found in Hakepuu, and the rest 

 in Kahana. Figures i to 5 are of Bulimella bulimoides Swn., found in 

 Kawailoa; figures 16 to 20 are of Bulimella obliqua Gk., found in 

 Kahana; figures 21 to 25 are of Bulimella rosea Swn., of which figures 

 21 to 24 are found in Wahiawa, and figure 25 is found in Helemano. 

 Intergrading forms are found between figure 5 of this plate and Buli- 

 mella glabra Nwc. ; between figure 8 of this plate and Bulimella oomor- 

 pha Gk. ; between figure 15 of this plate and Bulimella rotunda Gk. 



