EXPLANATION OF PLATES 



Figures natural size unless the dimensions indicate otherwise. 

 PivATU 3. 



Fig. 1. Actaeon riomaensis, n. sp. , Ion. 4.5 mm n 



2. Acteocina canaliculata Say, Ion. 3 mm 13 



3. Acteocina recta d'Orbigny, Ion. 2.5 mm 14 



4. Acteocina (Cylichnella) triticum-tritonis, n. sp., Ion. 3 mm... 14 



5. Volvula cylindrica Gabb, Ion. 4 mm 16 



6. Retusa yaquensis, n. sp., Ion. 3.50 mm 17 



7. At}^s doliolum, n. sp., Ion. 2.75 mm 18 



8. Bullaria paupercula Sowerby, Ion. 21 mm 18 



9. Bullaria Sarahberlinerae, n. sp 19 



10. Bullaria granosa Sowerby, Ion. 22 mm 20 



10 a. Bullaria granosa Sowerbjr, Ion. 22 mm 20 



11. Ringicula dominicana, n. sp., Ion. 1.5 mm 21 



12. Terebra sulcifera Sowerby 22 



13. Terebra sulcifera Sowerby, Chipolan 22 



14. Terebra bipartita Sowerby 23 



15. Terebra spirifera Dall 24 



16. Terebra spirifera Dall 24 



17. Terebra cirrus Dall 25 



18. Terebra oligomitra Dall 26 



19. Terebra gausapata laevifasciola, n. var., Ion. 18 mm 27 



20. Terebra Cambiarsoi, n. sp., Ion. 14 mm 27 



21. Terebra amitra Dall, after Dall, Ion. 9.5. mm 28 



Plate 4. 



Page 



Fig. 1. Terebra protexta Conrad, Ion. 12 mm 28 



2. Terebra ineequalis Sowerby 29 



3. Terebra haitensis Dall 30 



4. Terebra Petiti, n. sp 31 



5. Terebra gatunensis Toula 31 



6. Terebra Wolfgangi Toula 33 



7. Terebra Berlinerse, n. sp 34 



8. Terebra Berlinerae, n. sp 34 



9. Conus haytensis gurabensis, n. var 35 



10. Conus symmetricus domingensis Sowerby 37 



