74 MR. F. BALFOUR BROWNE ON AQUATIC COLEOPTERA 
while at another time in the same place the salinity has been' 
as low as 19 grains per gallon. 
Now if from the original table we separate out those species 
whose best record of occurrences is in the Muck Fleet district, 
we shall find that their occurrences in the other districts are 
as shown in the following table : — 
TABLE 6. Showing the district-distribution of those species having 
THEIR BEST RECORD OF OCCURRENCES PER IOO COLLECTIONS IN 
THE MUCK FLEET DISTRICT. 
Muck 
Fleet. 
Haliplus 
obliquus, F. - 
21.42 
19.54 
Coast 
I 7 - 5 I 
Palling 
H-Q 4 
Ormesby 
7.62 
Ant. 
3-91 
Hickling 
2.52 
Bure. 
,, variegatus, Sturm. 
11.42 
5 - 5 ° 
Ant. 
5.06 
Palling 
1.49 
Ormesby 
I. II 
Hickling 
— 
— 1 
,, ruficollis, De G. - 
95 7 i 
80.46 
Coast 
79.83 
Bure 
76.27 
Ant. 
70.14 
Ormesby 
63-59 
Palling 
54.19 
Hicklirg 
,, lineatocollis, 
Marsh. 
74- 28 
52-87 
Coast 
28.57 
Palling 
21.00 
Bure 
16.94 
Ant. 
16.41 
Ormesby 
8. 3 8_ 
Hickling 
Noterus sparsus, 
Marsh 
32-85 
26.89 
Bure 
21.83 
Coast 
13-55 
Ant. 
8-95 
Ormesby 
6. 14 
Hickling 
4.14 
Palling 
C/ELAMBUS 
inmqualis, F. - 
S2.85 
65-54 
Bure 
54.02 
Coast 
52.07 
Palling 
48.30 
Ant. 
39-65 
Hickling 
31-34 
Ormesl v 
Hydroporiis 
pictus, F. 
62.86 
54.02 
Coast 
45-37 
Bure 
42-39 
Palling 
40.29 
Ormesby 
35 * J 6 
Ant. 
28.49 
Hickling 
,, palustris, L. 
91.42 
83.19 
Bure 
68.22 
Ant. 
63.59 
Palling 
62.01 
Hickling 
56.71 
Ormesby 
55-17 
Coast 
Ii.ybius fenestratus, F. 
2.85 
1.68 
Bure 
1.49 
Ormesby 
.46 
Palling 
.42 
Ant. 
— 
— 
Hydrobius 
oblongus, Herbst. 
1 1.42 
— 
— 
— 
— 
— 
— 
Philhydrus 
testaceus, F. - 
25-71 
16.4I 
Ormesby 
12.64 
Coast 
7-56 
Bure 
6.I4 
Hickling 
5.08 
Ant. 
4.14 
Palling 
Enochrus 
bicolor, Gyll. 
17.14 
3-35 
I lickling 
i.i 5 
Coast 
.84 
Bure 
.46 
Palling 
— 
Laccobius 
bipunctatus, F. 
55-71 
33 - 6 i 
Bure 
19.54 
Coast 
14.28 
Palling 
13.43 
Ormesby 
11.86 
Ant. 
10.05 
Hickling! 
