236 
INDEX. 
Helix aspersa, monstrosities of, 112 ; perforations of lime¬ 
stone by, 117 ; poetical allusions to, ib. ; hybernation 
of, 118 ; amours of, 119. 
- Cantiana, 126. 
■- Cartusiana, 127 ; confinement to chalk of, ib . 
* - caperata, 125. 
- concinna, 129. 
- ericetorum, 141. 
- fruticum, 145. 
• - fusca, 131. 
- hispida, 129. 
- hortensis, 121 ; food of birds, 122. 
-incarnata, 145. 
- lamellata, 133. 
- lapicida, 140. 
- nemoralis, 120 ; jaw of, ib. ; varieties of, 121. 
- obvoluta, 141. 
- Pisana, 123. 
- Pomatia, 134 ; jaw of, ib. ; hybernation of, 135; growth 
of shell of, ib. ; experiments on, 136. 
- pulchella, 138 ; jaw of, ib. ; variety of, 139. 
-pygmsea, 144. 
-revelata, 132. 
- rotundata, 142. 
- ruderata, 145. 
- rufescens, 128, 
- rysa, 146. 
- sericea, 130. 
- virgata, 123; showers of, 124 ; eaten by sheep, ib. 
Hinge of shells, 10. 
Hinge-line , 12. 
Hybernation of snails, 97, 135. 
Hydrobia marginata, 146. 
-similis, 64. 
- ventrosa, 64. 
