FAUNA. OF THE CLYDE SEA-AKEA. 
471 
If the preceding table be summed up in the same manner as the 
first one the result is found to be as follows : — 
Arran Basin. 
Upper 
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Lock G-oil. 
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o 
o 
Brodick 
Basin. 
Kilbren- 
nan 
Basin. 
Inck- 
marnock 
Basin. 
Cum- 
brae 
Basin. 
Lock 
Fyne. 
m 
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o 
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O 
a 
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p 
50 
75 
50 
70 
50 
SO 
50 
50 
65 
35 
40 
35 
30 
to 
to 
to 
to 
to 
to 
to 
to 
to 
to 
to 
to 
to 
92. 
92. 
85. 
85. 
104. 
104. 
62. 
77. 
77. 
11. 
55. 
40. 
34. 
1 
5 
5 
5 
3 
2 
3 
1 
Mollusca 
22 
9 
9 
3 
23 
21 
16 
15 
8 
12 
17 
16 
7 
Brackiopoda 
1 
1 
1 
10 
9 
9 
2 
13 
12 
15 
8 
6 
7 
13 
6 
6 
Vermes 
4 
4 
1 
1 
3 
3 
4 
2 
1 
3 
4 
1 
Echinodermata 
3 
2 
7 
6 
9 
9 
5 
6 
3 
6 
7 
3 
6 
Totals 
40 
24 
26 
12 
54 
51 
36 
39 
22 
26 
42 
32 
21 
It is obvious at once that these numbers do not show so 
clearly as those previously obtained the gradual diminution in 
the number of species in the different basins. There is a slight 
tendency in this direction, but the exceptions are rather nume- 
rous, and if we take the bottom faunas of each basin instead of 
that below 50 fathoms the series of numbers is : — 
24, 12, 51, 36, 22, 26, 42, 32, 21. 
This result is extremely interesting because it seems to show 
that the bottoms of the remoter basins have a fauna which 
approaches the more seaward basins in respect of variety more 
nearly than do their faunas taken as a whole. It suggests the 
possibility that we have in these basins, in addition to the fauna 
derived from the present outer seas, which seems to be gradually 
making its way into them, a fauna which has been in them for a 
much longer period. 
Regarding the range of distribution of the species which are 
confined to these depressions we find ; — 
LINN. JOURN. — ZOOLOGY, VOL. XX. 36 
