76 
Ariodonta teres, 
Paludina genicula, 
magnifica, 
Melania excurata, 
Hydeii, 
annulifera, 
salebrosa, 
pyrenella, 
bitaeniata, 
comma, 
lima, 
alveare, - 
nassula, 
cylindracea, 
trochiformis, 
vestita, 
Anculotus praerosus, 
subglobosus, 
angulatus, 
plicatus, 
monodontoides, 
pictus, 
pumilus, 
tseniatus, 
melanoides, 
nigrescens, 
Ancylus fllosus, 
Page plate fig. 
47 
7 
2 
48 
8 
3 
48 
8 
4 
49 
4 
6 
50 
8 
1 
51 
8 
2 
51 
4 
5 
52 
8 
5 
52 
8 
6 
53 
8 
7 
54 
8 
8 
54 
4 
7 
55 
8 
9 
55 
8 
10 
56 
8 
11 
57 
8 
12 
59 
8 
13 
60 
8 
14 
60 
8 
15 
61 
8 
18 
61 
62 
62 
8 
16 
63 
64 
8 
19 
64 
57 
8 
17 
ERRATA. 
Page 11, line 14, for is very remarkable, read are very -re- 
markable. 
Page 10, line 3, for irridescent read iridescent . 
