INDEX. 
237 
I. 
Imperforated shells, 44. 
Incomplete aperture of shells, 45. 
Inequilateral shells, 11. 
Inoperculata, or typical Pulmonifera, 65 ; genera of, 66. 
Intestines of bivalves, 14. 
L. 
Lamelli-branchiata (class), 4. 
Land snails (Helicidse), characters of, 92 ; structure of ten¬ 
tacle of, ib. ; mouth of, 93 ; reproduction of, 94 ; growth 
of shells of, 95 ; habits of, 96 ; epiphragm of, ib. ; 
hybernation of, 97, 135 ; geographical distribution of, 
97 ; cleaning shells of, 98 ; genera of, 99 ; destructive 
to vegetation, 113 ; how to destroy, 114 ; medicinal 
properties of, 115; pomade of, ib. ; edible kinds of, 
116, 134; perforation of limestone by, 117 ; poetical 
allusions to, ib. ; amours of, 119 ; showers of, 124 ; as¬ 
sociation of to particular soils, 97, 127, 140, 157 ; food 
for birds, 122 ; eaten by sheep, 124 ; enemies of, 114, 
124. 
Lateral teeth , 12. 
Length of shell, 11. 
Ligament of bivalves, 11. 
Limacid^e (family), 66. 
Limax, generic characters of jaw of, habits of, 72. 
- agrestis, 75. 
- arborum, 78 ; suspension of, ib. 
-brunneus, 77. 
- flavus, 74. 
- gagates, 81 ; jaw of, 72. 
- maximus, 73. 
- Sowerbii, 79. 
- tenellus, 77. 
