64 
PHYLLIVORA, 
Number of 
transverse 
rows. 
Number of 
teeth in 
row. 
Number of 
teeth on 
tongue. 
Arion ater - 
160 
110 
17,600 
Limax maximus 
- 
160 
180 
28,800 
carinatus 
- 
80 
100 
8,000 
Vitrinus pellucidus - 
- 
100 
75 
7,500 
Helix aspersa 
- 
135 
105 
14,175 
nemoralis 
- 
135 
100 
13,500 
pomatia 
•• 
140 
150 
21,000 
obvoluta 
- 
170 
90 
15,300 
lapicida 
- 
150 
80 
12,000 
pulchella 
- 
65 
30 
1,950 
cantiana 
- 
125 
80 
10,000 
concinna 
- 
100 
50 
5,000 
pisana 
- 
120 
70 
8,400 
caperata 
- 
100 
45 
4,500 
ericetorum 
- 
115 
60 
6,900 
Zonites alliarius 
- 
45 
25 
1,125 
— cellarius 
- 
35 
27 
945 
nitidulus 
- 
55 
65 
3,575 
Succinea putris 
■ 
50 
65 
3,250 
Balanus obscurus 
- 
120 
55 
6,600 
acutus 
- 
100 
37 
3,700 
Zua lubrica 
- 
80 
40 
3,200 
Pupa juniperi 
- 
100 
40 
4,000 
Balea perversa 
- 
130 
40 
5,200 
Clausilia bidens 
- 
120 
50 
6,000 
nigricans - 
- 
90 
40 
3,600 
Limneus stagnalis - 
- 
110 
110 
12,100 
Ancylus fluviatilis - 
- 
120 
75 
9,000 
Velletia lacustris 
- 
75 
40 
3,000 
Since Limax maximus heads the list with 28^000 
teeth, and Helix pomatia follows with 21,000, it might 
be conjectured, perhaps, that size had some influence 
in the matter ; but we find Helix aspersa and H ne- 
moralis possessing nearly the same number, while 
Helix ohvoluta — a shell very little, if at all, larger 
than Zonites cellariiis — possesses more than fifteen 
times the number of teeth. 
