186 



indented with a slit or fissure near the columella, which is 

 callous at the base ; operculum horny, sometimes a little cal- 

 careous, not spiral. 



A series of prettily painted, bright- coloured little shells, including, be- 

 sides Helicina proper, the subgenera Alcadia, Schasicheila, Lucidella, and 

 Trochatella of authors, are classed under this head. Only four species 

 were known to Lamarck. Now we have more than 270. By far the 

 greater number are inhabitants of the West Indies and Central America ; 

 a few are from the Pacific, Feejee, and Philippine Islands. 



A character to be noted in this genus is that the operculum is never 

 spiral. It is mostly horny, sometimes a little calcareous. A few of the 

 Helicina; are characterized by a slit in the margin, which, as in Pupina, is 

 not unfrequently filled up with enamel. 



1. acuminata, Velasq. 



2. acuta, Pfr. 



3. acutissima, Sow. 



4. Adamsiana, Pfr. 



5. adspersa, id. 



6. agglutinans, Sow. 



7. albocincta, Jacq. 



8. albolabris, id. 



9. amcena, Pfr. 



10. ampliata, Ad. 



11. angulata, Sow. 



12. Antillarum, id. 



13. Antoni, Pfr. 



14. arenicola, Mor. 



15. articulata, Pfr. 



16. aurantia, Gray. 



17. Barbadensis, Pfr. 



18. Bastidana, Poey. 



19. Bayamensis, id. 



20. beryllina, Goidd. 



21. Besckei, Pfr. 



22. biangulata, id. 



23. bicolor, id. 



Species* 



24. Blandiana, Gundl. 



25. Brasiliensis, Gray. 



26. brevilabris, Pfr. 



27. Briarea, Poey. 



28. bulla, Pfr. 



29. Candeana, D'Orb. 



30. caracolla, Moric. 



31. carinata, D'Orb. 



32. Catalinensis, Pfr. 



33. Chiapensis, id. 



34. chrysochasma, Poey. 



35. chrysockeila, Binn. 



36. ckrysocheila, Shutt. 



37. ciliata, Poey. 



38. cinctella, Shutt. 



39. cingulata, Pfr. 



40. citrina, Grat. 



41. Columbiana, Phil. 



42. columellaris, Gundl. 



43. concentrica, Pfr. 



44. concirma, Gundl. 



45. conoidea, Pfr. 



46. convexa, id. 



47. Cordillerse, Salle. 



48. cornea, Sow. 



49. costata, Gray. 



50. crassilibris, Phil. 



51. Curaingiana, Pfr. 



52. delicatula, Shutt. 



53. denticulata, Pfr. 



54. depressa, Gray. 



55. diapliana, Pfr. 



56. Dominicensis, id. 



57. Draytonensis, id. 



58. Dysoni, id. 



59. egregia, id. 



60. elata, £/«<«. 



61. elongata, If Orb. 



62. exigua, -P/>\ 



63. exigua, Jacq. 



64. fasciata, Lam. 



65. festiva, /Sew. 



66. flaramea, Quoy. 



67. flavida, Menke. 



68. foveata, P^r. 



69. fragilis, Mor. 



* The Land Shells having been recently described by Dr. Pfciffer, it is intended to give the 

 list of species from his monographs, regarding his genera as subgenera. 



