PLATE XVIII. 



Fig. 1. Scala hellenica var. Morchiana Dall ; 6. 87. Page 322. 



2. Scala discobolaria Dall ; 6.5. Page 324. 



3. Actceon perforates Dall ; 7.75. Page 42. 



4. Scala aurifila Dall ; 11.0. Page 322. 



5. Niso interrupta Sowerby var. albida Dall ; 8. 1 . Page 330. 



6. Niso interrupta var. albida Dall, base ; 3.5. Page 330. 



7. left's nucleata Dall ; 9.3. Page 325. 



8. Aclis lata Dall ; 5.5. Page 324. 



9. Scala contorquata Dall ; 4.7. Page 318. 



"10. Scala polacia Dall, aperture imperfect ; 7.25. Page 319. 



" 11. Scala formosissima Jeffreys ; 8.5. The aperture is a little distorted where 

 it joins the body whorl. Page 319. 



lib. Scala belaurita Dall ; 8.3. Page 316. 



12. Aclis egregia Dall ; 13.0. Page 325. 



