of the Fishery Board for Scotland. 185 
The contrast between two of the places may be brought out in the 
following manner by comparing the sizes at Inveraray and Strachur, 
reduced to percentages, the number of fish being in the former case 1165 
and in the latter 668, and both series collected on the same days (see 
fig. 3, pl. xii.) :-— 
Cm. | Strachur. | Inveraray. | 
eee 
1 | - =A | 
a) | 0-15 - | 
2 | 85 0:08 
i) | 37°90 2:90 
3 | 35°90 25°50 
5 11°80 37°40 
4 4:20 20°40 
5) 1:00 8-80 
5 0°40 3°60 
2) = 1:10 
6 ~ 0:08 
It may be said that in August the average size and the minimum size 
were also larger at Inveraray than at Strachur, the average at the former 
place being 66°5mm. and at the latter 52-Omm., while the minimum sizes 
were 48mm. and 34mm. In the collections in June and July, 1903, the 
same feature is repeated, thus :— 
| ; | 
| Date. pum Smallest. Largest. Average. 
| ish. 
Inveraray, . . | June 22 86 17 | 47 20-7 
Sirachur, 2° ©. | 4,'° 24 94 15 29 19-94 
Inveraray, . . | July 10,11 105 17 50 30°4 
Strachur, us 50 19 57 26°8 
The explanation put forward by Mr. Dannevig to account for this 
difference was the probability that the temperature at Inveraray is higher 
than at Strachur, owing to the former locality being less affected by the 
deep-water tidal currents, and he pointed out that the size of the small 
plaice at the top or upper parts of the loch appears to be slightly greater 
than at the lower parts near the mouth. So far as the somewhat limited 
observations on the temperature are available they seem to show a rather 
higher temperature at Inveraray, as a rule, but not always. 
The other collections referred to in the Tables were made in June and 
July, 1903. The period in June extended from the 22nd to the 26th, 
and the small plaice caught numbered 218. They ranged in size from 
15mm. to 47mm., a difference of 32mm., and the average length was 
computed to be 23°9mm. The greater number ranged about 20mm., but 
it would appear from the curve (fig. 2, plate XII.) that the smaller sizes 
were not fully represented. , 
In July the collections were made from the 10th to the 13th. The 
number of plaice taken was 448, ranging in size from 17mm. to 57mm., 
the average being 29°0mm., or only about 5mm. higher than in June. 
The interval may be placed at about 18 days. 
