40 
GENERIC SYSTEM. 
MULTIVALVES. UNIVALVES. 
1 Chiton 
40 
8 
18 
Argonauta 
11 
0 
2 Lepas 
45 
19 
19 
Nautilus - 
58 
22 
3 Pholas. - 
12 
5 
20 
Conus 
155 
0 
21 
Cyprsea - 
68 
2 
BIVALVES. 
22 
Bulla 
61 
20 
4 Mya 
41 
18 
23 
Voluta 
186 
16 
5 Solen 
35 
12 
24 
Buccinum 
172 
18 
6 Tellina 
97 
25 
25 
Strombus 
44 
3 
7 Cardium - 
54 
16 
26 
Murex 
171 
27 
8 Mactra - 
37 
15 
27 
Trochus - 
130 
13 
9 Donax 
21 
7 
28 
Turbo 
167 
77 
10 Venus 
116 
34 
29 
Helix 
189 
70 
11 Spondylus 
4 
0 
30 
Nerita 
70 
11 
12 Chama 
25 
1 
31 
Haliotis - 
21 
1 
13 Area 
45 
9 
32 
Patella 
102 
14 
14 Ostrea 
84 
13 
33 
Dentalium 
15 
7 
15 Anomia - 
32 
5 
34 
\ 
Serpula - 
38 
28 
16 Mytilus - 
49 
17 
35 
Teredo 
4 
1 
17 Pinna 
21 
3 
36 
Sabella - 
25 
13 
Total - 2445 550 
