of the Fishery Board for Scotland. 239 
mean was 19cm., and the average 19°26cm., or 7% inches. The growth 
indicated in a year, from the former series, was 6:12cm., or 274, inches. 
These fishes were over two years of age. 
In this collection there were also a few of larger size, but their number 
is not sufficient to indicate grouping. 
From Aberdeen Bay a number of collections were also obtained, some 
of which may be referred to (pl. XIII.). 
On the 5th July, the first series was represented by 109 gurnards, 
measuring from 9°7em. to 13°8cm. (33-54 inches); the greater number 
measured about 11*5em. to 12cm., the mean was 12cm., and the computed 
average 11:56cm., or 4,°, inches. These fish were about a year old. 
The next series included 61 gurnards from 14*2cm. to 19-9cm. (58-73 
inches), The maximum number were at 17cm., the mean size was also 
17em., and the computed average 16°90cm., or 68 inches. The amount 
of growth indicated in a year from the preceding series was thus about 
5°34em., or 23 inches. 
On the 30th and 31st July, the first series comprised 12 gurnards from 
11-2em. to 15-1em, (48-6 inches). The maximum number were at l4cm., 
the mean was 13cm., and the average 13°49cm., or 5,5; inches, which is 
about lcm, greater than it ought to be, owing to the absence of small 
fishes. 
The next series consisted of 33 gurnards, measuring from 16‘7cm. to 
21:4em. (6;°,-8,% inches). The maximum number were at 18°5cm., the 
mean was the same, and the average was 18°73cm., or 73 inches. These 
tish were over two years old, and the amount of growth indicated in a 
year from the preceding series was 5:24cm., or 2 inches, which is rather 
under the normal, owing to the absence of small fishes in the preceding 
series, 
On 1st September the young gurnards are represented in the collection. 
On that day 17 were taken, measuring from 32mm. to 71mm. (1}-27 
inches) ; the maximum number were at 5cm., which was also the mean, 
and the computed average was 54‘lcem., or 23 inches. The age of these 
fishes was probably 3 or 4 months. 
On the 20th September five of this series were got, measuring from 
5-3cm. to 9°7cem., but the October collection shows that the smaller fishes 
were not present. 
The second group numbered 52, varying in length from 11‘6cm. to 
16‘7cem. (4,°,-6,%, inches); the maximum was l5cm., the mean 14cm., 
and the average 14:57cm., or 53 inches, the probable age being about 
16 months, 
In the third series there were 37 gurnards, ranging from 17‘2cm. to 
22cm. (63-8? inches) ; the maximum number were at 20-5cm., the mean 
was 19-5cm., and the average 20°02cm., or 73 inches. The growth of 
this series, about 2 years and 4 months of age, was apparently 5°45cm., 
or 24 inches in the year. 
A collection on the 13th October contained 24 gurnards of the first 
series. They varied in length from 2*lem. to 8cm. (3-33 inches) ; the 
maximum number were at 6cm., and the mean was 6cm., the computed 
average being 4°65cm., or 142 inches, which is too small, owing to the 
smaller fishes being over-represented. 
The next series included 18 gurnards, from 12cm. to 16°8cm. (47-62 
inches) ; the maximum number were at 14°5cm., the mean was the same, 
and the average 14°63cm., or 53 inches. These fish were about 1 year 
and 4 months old. 
a third series comprised only two fishes, 19°3cm, and 22°8cm. in 
ength. 
