Family Littorinide 
Genus Littorina 
Sub-Genus Tectus 
5 Echinella . 
Genus Limnotrochus . 
»  Plesiotrochus . 
Sub-Family Fossaring 
Genus Risella 
Sub-Genus Peasiella . 
Genus Phaneta. °. 
»  Fossar 
Sub-Genus Couthouyia 
Genus Conradia 
Sub-Genus Gottoina . 
Genus Raulinia . 
»  Cithna 
»  Isapis ae 4 
»  Fossarina 
Sub-Family Lacunine 
Genus Cremnoconchus 
»  Stenotis . 
»  uacuna . 
» Modulus. 
Family Planaxide 
Sub-Family Litiopine 
Genus Litiopa 
Styliferina 
»  Diala ‘ 
3» Alaba . 3 
»  Planaxis. 
» Quoyla . 
3,  Holeostoma 
Family Melaniide 
Sub-Family Ceriphasinz 
Genus Io . 
9 Pleursvera A 
Sub-Genus Strephobasis 
Genus Goniobasis 
Sub-Genus Schizostoma 
INDEX. 
Pace 
135 
135 
155 
157 
157 
157 
158 
158 
159 
162 
162 
166 
168 
170 
170 
170 
171 
171 
172 
172 
173 
173 
175 
177 
177 
177 
178 
179 
181 
184 
193 
193 
193 
193 
194 
194 
156 
196 
202 
Sub-Genus Meseschiza 
Genus Anculosa 
Sub-Genus Eurycaelon 
Genus Lithasia. 
Sub-Genus Angitrema 
Sub-Family Melaniine 
Genus Melanopsis 
Sub-Genus Pacndhontistnns.: 
Genus Hemisinus 
»  Doryssa . 
»  Faunus . 
Sub-Genus Melanatria 
Genus Pirenopsis 
»  Claviger. 
»  Lartetia. 
Oncomelania 
»  Tiphobia 
»  Pyrgula . 
»  Moitessieria 
», Lhotellieria 
»  Paladilhia a 
»  Bugesia . 
Melania : 
Sub- Genus Striatella . 
& Melanoides 
35 Sulcospira 
35 Nigritella . 
Es Pachychilus 
ie Acrostoma 
si Melanella . 
43 Paramelania 
Pe Tarebia . 
5 Tiara 
es Plotia 
Mainwaringia 
Sub-t amily Paludominss 
Genus Paludomns 
Sub-Genus Philopotamis 
; Tanalia 
Paae 
202 
202 
205 
205 
205 
206 
206 
214 
215 
216 
217 
218 
218 
219 
219 
219 
219 
220 
220 
220 
220 
221 
221 
231 
248 
266 
268 
268 
270 
271 
272 
272 
278 
280 
286 
287 
287 
297 
301 
