1904-5.] Salmon in transition from Smoli to Grilse. 397 
were sent to him by mackerel fishers near Oks0. Those measured 
43, 36, and 17*5 cm. Two other specimens he found in the 
Zoological Collection of Bergen University, which, though unde- 
scribed, are believed by Professor Collett to have been found 
amongst young mackerel in the Christiania fish market. They 
measure 23*5 and 28 cm. 
Dahl’s special netting in Norwegian fjords and some special 
netting which I have carried on in Scotland have as yet produced 
only negative results. Sea trout can easily be obtained in all 
stages at and near the mouths of rivers, but it is clear that on 
entering salt water the salmon smolt separates himself from the 
sea trout, and has a habitat in the sea which has not yet been 
discovered. 
The particulars of measurement, etc. respecting the Galway 
fish are given below. They are those most approved by the 
British Museum authorities for the purpose of identifying the 
species of salmonidse. I may add that I have already submitted 
the specimen to Mr Boulenger in London, and that he and his 
colleague Mr C. T. Began, who made a separate identification, 
agree that the fish is a salmon. 
The measurements are given in millimetres. 
1. Sex, ......... 
6 
2. Length to centre of caudal fin, 
350 
3. Weight, 
4. Length of head from end of snout to posterior 
border of gill cover, ..... 
77 
5. Length of head to anterior border of eye, 
21 
6. Diameter of eye, 
11 
7. Length of mouth from end of snout to posterior 
border of maxillary bone, .... 
35 
8. Length of caudal peduncle, measured in a 
straight line from base of last ray of anal fin to 
base of lowermost ray of caudal fin, 
47 
9. Least depth of caudal peduncle, 
29 
10. Length of longest ray of anal fin, 
39 
11. Shape of posterior border of tail, 
Fully notched 
12. Number of scales, counting from posterior 
extremity of base of adipose fin downwards and 
forwards to lateral line, ..... 
12 
13. Number of gill-rakers, .... 7 + 6 (gills damaged) 
14. Presence or absence of black spots below the 
lateral line in the region of the ‘ shoulder 5 . Present. 
In general appearance (PI. I.) the fish has to my eye certain 
