INDEX TO GENERA. 263 



Pomatia, 122, 232, 236. Tapada^Cantareus, 234. 



Praticola, 67, 76. Tectula, 4, 41. 



Pseudiberus, 50. Thea=Plectotropis, 50. 



Pseudocampyliea, 69, 114. Tradiia, 51, 62. 



Rhagada, 256. Trocluila==T urricula, 3. 



Bimula=ActineUa, 4, 40. Ttirricula, 3, 23. 



Spirorbula^Heterostoma, 4. Turritella^Discula, 5, 46. 



Tachea, 121, 122. XerOcampylsea, 68, 83. 



Tacheocampylrea, 68, 112. Xeroleuca, 3, 21, 256. 



