List of Illustrations 



17 



runctured Limpet, from 

 above .... 

 Common Slit-limpet 

 Rosy Slit-limpet 

 Ormer . , . • 



Top-shells and Pheas- 

 ant-shell . 

 Head of Grey-top . 

 Operculum 

 Common Top-sheli . 

 Grey Top-shell 

 Painted Top . 

 Pheasant-shell 

 Head of Phasianclla 

 Fresh-water Nerite 



Necklace -shells and 



Winkles . 

 Violet Sea-snail with its 



float . . . • 

 Violet -snail and float, 



side' view 

 Head of Wentletrap 

 Common Wentletrap 

 Glossy Aclis-shell . 

 Egg -hand of Natica 



alderi .... 

 Large Necklace-shell 

 Life aspect of N. mtena . 

 Common Necklace-shell . 

 Velvet-shell . 

 Hungarian Cap 

 Cup-and-Saucer Limpet, 



interior 

 Single row of teeth from 



theradulaof Periwinkle 

 Animal of male Peri- 

 winkle, with the shell 



removed 

 Periwinkle 

 Eggs of Periwinkle 



195 

 195 

 195 

 19G 



199 

 201 

 201 



201 

 205 

 205 

 207 



208 

 208 



210 

 211 



212 



218 

 213 

 214 



215 

 216 

 216 

 217 

 219 

 221 



221 



223 

 224 



PAGE 



Banded Chink-shell, . 226 

 Banded Chink-shell, en- 

 larged . . . .226 

 Pallid Chink-shell . . 227 

 Eggs and young of Pallid 

 Chink-shell. . . 227 



Spire-shells and Marsh- 

 snails. . . .228 

 Round-mouthed Snail . 229 

 Latticed Spire-shell . 231 

 Thick-lipped Spire-shell . 231 

 Laver Spire-shell . . 232 

 Common Bithynia . . 233 

 Dun Sentinel . . .233 

 Dun Sentinel . . .234 

 White Belted -shell . . 234 

 River Snails . . . 235 

 Common River Snail . 236 

 Lister's River Snail . 236 

 Common Valve-shell . 237 



Cowry and Pyramid- 

 shells. . . . 238 

 Small Needle-whelk . 239 

 Auger-shell . . .240 

 Blind-shell . . .240 

 Pelican's foot . . .241 

 Pelican's foot, from below 242 

 Margin-shell, from above 



and below . . . 243 

 JNIargin-shell and animal 243 

 Poached Egg . . .244 

 Poached Egg-shell . . 244 

 Young shell of Cowry . 245 

 European Cowry, from 



above and below . . 245 

 European Cowry . . 245 

 Atlanta iKroni . . 246 



Whelks and Conelets . 248 

 Polished Eulima . . 249 



