180 BULLETIN 3T, UNITED STATES NATIONAL MUSEUM. 



PLATE XI. 



FIG. 1. Drillia nucleata Dall ; 13.5. 



2. Drillia Ferrillii Dall ; 5.5. 



3. Drillia lissotropis Dall, youug ; 4.5. 



4. Drillia lissotropis Dall, adult; 7.0. 



5. Drillia havanensis Dall ; 9.0. 



6. Drillia lithocolleta Watson, young; 12.5. 



7. Drillia amir n a Dall ; 15.0. 



8. Drillia olcacina Dall ; 10.0. 



9. Many ilia pelagia Dall ; 10.75. 

 10. Leucosyrinx Sigsbeei Dall ; 25.5. 



It. Mangilia antonia Dall, young; 7.0. 



12. Mangilia comatotropis Dall ; 6.0. 



13. Pleurotomvlla leucomata Dall ; 13.5. 



14. Manyilia Agassizii V. & 8.; young shell of var. mexicana Dall ; 8.5. 



15. Manyilia qnadrata var. monocingulata Dall ; 6.75. 



16. Mangilia quadrata var.; 7.0. 



17. Hanyilia peripla Dall ; 8.0. 



18. DrilUapreirtorra'Dskll; 9.5. 



PLATE XII. 



FIG. 1. Daphnella morra Dall ; 5.75. 



2. Drillia pharcida Dall ; 9.5. 



3. Mangilia ? subsida Dall ; 13.0. 



4. Cythara cymella Dall ; 13.0. 



5. Genota mitrella Dall; 12.5. 



6. Cythara Bartlettii Dall, adult, ; 8.0. 



7. Mangilia elusiva Dall ; 9.25. 



8. Mangilia toreiimata Dall; 10.5. 



9. FleitrotomellajiliferaDall; 17.5. 



10. Glypho8tomagratulaDall; 17.5. 



11. Drillia detecta Dall ; 11.75. 



12. Ancistrosyrinx radiata Dall ; 13.0. 



PLATE XIII. 



FIG. 1. Drillia eucosmia Dall ; 19.0. 



2. Genota (Dolichotoma) viabrunnea Dall; 38.0. 



3. DrilUahaliostreiriisDaU ; 20.0. 



4. Glyphostoma Gabbii ^ Dall, young ; 9.5. 



5. Glyphostoma Gabbii Dall, young; 9.5. 



6. Drillia pagodula Dall ; 13.5. 



7. Glyphostoma Gabbii Dall, adult ; 19.0. 



8. Glyphostoma Gabbii Dall, young ; 16.0. 



