180 BULLETIJS J/, UiMTED iSTATKci >iAllUiSAL AIL&ElM. 



PLATE XI. 



Fig. 1. Drillia nucleata Dall ; 13.5. 



2. Drillia FerrillH DnW; 5.5. 



3. Drillia lissotropis Dull, youug ; 4.5. 



4. DnlliaUssolroins Diill, adnlt; 7.0. 



5. Drillia havavcnaiN IJall ; 9.0. 



6. Drillia lithocollrtu Watson, young; 12.5. 



7. Drillia smirna Dull: 15.0. 



8. Drillia oleaci II a Dall; 10.0. 



9. Mangilia pdagia Dall ; 10.75. 



10. Leticosyrinx Si'jsheei Dall ; 25.5. 



11. Mangilia antoiiia DiiU, Yoniig; 7.0, 



12. Mangilia comatotropis Dall ; 6 0. 



13. Pleurotomdla leuco luita Dall ; 13.5. 



14. Mancjilia Agassizii V. & H.; young shell of var. mexicana Dall ; 8.5. 



15. Mangilia quadraia var. monocingulata Dall ; 6.75. 



16. Mangilia quadrata var.; 7.0. 



17. Mangilia peripl a Dall ; «.0. 

 lb. Drillia premorraY>&\\\ 9.5, 



PLATE XII. 



Fig. 1. Daphnella morra Dall ; 5.75. 



2. Drillia pharcida Dall ; 9.5. 



3. Mangilia ? subsida Dall ; 13.0. 



4. Cgthara eyniclla Dall ; 13.0. 



5. Genota mitrella Dall ; 12.5. 



6. Cythara Bartlettii Dall, adult; 8.0, 



7. Mangilia elusiva Dall ; 9.25. 



8. Mangilia torenmata Dall; 10.5. 



9. Fleurotomella filiftra Dall ; 17.5. 



10. Gly2)hostoinagralula Dall; 17.5. 



11. Drillia detecta Bull; 11.75. 



12. Ancistrosyrinx radiata Dall ; 13.0. 



PLATE XIII. 



Fig. 1 



Drillia eucosinia Dall ; 19.0. 



Genota {Dolicliotoma) viabrunuea Dall; 38.0. 



Drillia haliofitreplns Dall ; 20.0. 



Glyphostoma Gahbii Dall, young; 1 .5. 



Glyphostonia Gabbii Dall, young; 9.5. 



Drillia pagodiila Dall; 13.5. 



Glyphostomi (r((?j&u Dall, adult; 19.0. 



8, Glyphostoma Gabbii Dall, youug ; IG.O. 



