— (i6 -- 



III. l'^siiôees terreditres coiiiniunes entre l*ortoi'ieo et la 

 •fniiitiïc|iie. 



* 1 . Hyalinia Gundlachl, Pfeiiïer. 



2. — dioscoricola, C. B. Adams. 

 *3. — minuscula, Binney. 



*4. Bulimulus nitididus, Pfeifîer. 



5. Cylindrella pallida, Guilding. 



*6. 0])eas subida, Pfeifîer. 



*7. — octonoides, C. B. Adams. 



*8. — Goodalli, Miller. 



*9. Subalina oclona, Cliemnitz. 



*10. Spiraxis paiadinoides, A. d'Orbigny. 



*11. Ptipa pellucida, Pfeifîer. 



12. — liexodon, C. B. Adams. 



IV^ Espèces terrestres communes entre Portorico et 

 iiaint-Tliomas. 



* 1 . HjjaUnia Gundlacld, Pfeifîer. 

 *2. Heiix vortex, Pfeifîer. 



3. — subaquila, Shiittleworth. 



4. — euclasta, Shiittleworth. 



5. Obeliscus Siuiftianus, Pfeifîer. 

 *6. Opeas svbula, Pfeifîer. 



*7. — octonoides, C. B. Adams. 

 *8. — Goodalli, Miller. 

 *9. SubuUna oclona, Chemnitz. 

 MO. Pupa pellucida, Pfeifîer. 



11. Bulimulus virgulaliis, Férussac. 



12. — exilis, Gmelin. 



13. — frateiculus. Férussac. 



14. Macroceramus microdon, Pfeifîer. 



15. Cylindrella pallida, Guilding. 



16. Succinea approximans, Shuttleworth. 



17. Vaginula occidentalis, Guilding. 



18. Helicina striata, Lamarck. 



19. — fove.ata, Pfeifîer. 



