EXPLANATION OF PLATES. 421 



FIGTTRE, PAGE. 



26, 27. Fernssina tricarinata, Braun. Miocene, Europe, . 290 



28. Helicina variegata, d'Orb. Cuba, 291 



29, 30. Helicina (Pachystoma) aggiutinans, Sowb. Phil., . 291 



31. Helicina (Poenia) depressa, Gray. Jamaica, . . . 291 



32. Helicina (Idesa) rotunda, d'Orb. Cuba, . . .291 



33. Helicina (Emoda) festiva, Sowb. Hayti, . . . 291 



34. Helicina (Dawsonella) Meeki, Bradley. Carboniferous, 



Ohio, 291 



35. Trochatella constellata. Morel. Isle of Pines, . . 291 



36. Trochatella (Yiana) regina, Morelet. Cuba, . . 291 

 31, 38. Schazicheila alata, Menke. Guatemala, . . . 291 



39. Alcadia Brownii, Gra}^ Jamaica, ..... 292 



40. Lucidella aureola, Fer. Jamaica, ..... 292 



41. 42. Bourciera heliciniformis, Pfr. Ecuador, . , 292 



43. Stoastoma pisum, C. B. Adams. Jamaica, . . . 292 



44. Stoastoma (Electrina) succinea, Sowb. Isle of Opara, 292 



45. 46. Stoastoma (Lewisia) Philippiana, C. B. Adams. 



Jamaica, ......... 292 



47. Proserpina depressa, d'Orb. Cuba, .... 293 



48. Proserpina (Cyane) Blandiana, A. Ad. Peru, . . 293 



49. Ceres eolina, Duclos. Mexico, ..... 293 



50. Ferussina(Scoliostoma) megalostoma, Sandberger. Mio- 



cene, Europe, ........ 290 



Plate 78. 



51. Nerita polita, Linn. New Ireland, .... 294 



52. Nerita peleronta, Linn. ; operculum. West Indies, . 294 



53. Nerita histrio, Linn. Australia, ..... 294 



54. jSTerita undata, Linn. Polynesia, ..... 294 



55. Nerita (Peleronta) Deshayesii, Recluz. Panama, . 294 



56. Nerita (Theliostyla) exuvia, Linn. Polyaiesia, . . 249 



57. 58. Nerita (Deianira) bicarinata, Stolicz. Cret., Europe, 294 



59. Deshayesia Neritoides, Grat. Tertiary, France, . . 295 



60. Neritopsis radula, Linn. Ceylon, ..... 295 



61. 62. Neritopsis radula, Linn. ; operculum, . . . 295 



63. Neritoma angulata, Sowb. Jurassic, Europe, . . 295 



64. Neritoma (Neridomus) hemispherica, Romer. Oolite, 



Europe, 295 



65. Neritina communis, Quoy. Philippines, . . . 295 



66. Neritina (Theodoxus) fluviatilis, Linn. Europe, . . 296 



67. Neritina (Theodoxus) Mertoniana. Philippines, . . 296 



68. Neritina (Dostia) crepidularia, Lam. Ceylon, . . 296 



69. 70. Neritina (Clypeolum) pulligera, Linn. Moluccas, . 296 



71. Neritina (Clithonj longispina, Recluz. Isle Rodrigues, 296 



72. Neritina (Neritona) labiosa, Sowb. Philippines, . 296 



73. Neritina (Smaragdia) viridis, Linn. West Indies, . 297 



