— 215 — 



found throughout the whole summer also, both the glass-eel stage and a little older, usually 

 on places covered with sea-weed near land or in strand-pools, partly on the rocks far 

 out in the fjord. In July 1Ö72 Prof. Sars thus collected several tiny fry with a total 

 length of 65—70 mm. at Hvitings Island (off Bukn Fjord), where there are no streams 

 or rivers, and similar fry or a little larger have been taken by me on the beach at Rauö 

 in Christiania Fjord and at Sandnaes in the months of July and August. Such eel-fry are 

 also taken through the whole summer during the trawling for Pattdalus borealis ; 

 Christiania Museum possesses several of these with a length of 66— 150 mm., taken by 

 Dr. HjORT in Hafrs Fjord at Stavanger from May 6th to July 28th 1898." 



The Director of the biological station in Bergen, Dr. 0. Nordgaard has sent me a 

 large number of eel-fry from Norway. Amongst them are some taken in the salt water 

 at Breivik (S. from Kjökelvik, due south from Bergen) on March 23rd, 905). These eel- 

 fry are in Stage 5 and thus colourless glass-eels. Dr. Nordgaard writes regarding them 

 in a letter: "we were fishing at this place with the eel-seine after the first year's group 

 of cod and saithe. Some white, dead eel-fry also came up in the catch. It appeared 

 that these were thrown up by a year old saithe. One saithe preserved had a young eel- 

 fry hanging half out of its mouth. It is evident that the tiny eel-fry have numerous 

 enemies amongst the prevalent shoals of saithe." 



Sweden. The glass-eel has also been found in the sea on the Swedish west coast. 

 Regarding this Smitt^ writes: "All the eel-fry however do not go up the- rivers at this 

 age (i. e. as glass-eels). A goodly number remain in the sea one or two years and only 

 go up when they have reached a length of 20—40 cm."; and later in a note: „in the 

 former outlet of Nissa River, the socalled Svinbäcken, which was open to the sea but is 

 now for the most part stopped up, eel-fry of 5 — 10 cm. in length used to occur in the 

 summer without showing any desire to migrate, and the boys of Halmstad found pleasure 

 in wading in the shallow water in order to rouse and catch the fry from the clay 

 or mud. 



Denmark. The most important work yet published on the occurrence of the 

 glass-eels in the sea is that by A. C. Johansen already mentioned. In March and April 

 1905 Johansen found numerous glass-eels both in the North Sea and in the Danish 

 waters lying within the Skaw (Kattegat) and he has shown that they lead a pelagic life 

 on the surface of the water at nighttime during these months, whilst in the day they 

 keep nearer to the bottom =. That this interesting observation of Johansen's holds good 



1 Smitt. Skandinaviens Fiskar, II, Stockholm, 1895, p. 1032 and note. 



2 A. C. Johansen, Remarks on the life-history of the young postlarval eel {AngtUlla milgaris Turt.) 

 (Meddel, fra Kommissionen for Havun dersagelser, Serie; Fiskeri, Bind I, No. 6, 1905). The correctness of 

 Johansen's observation is seen from the following hauls, all with PETERSEN'S young-fish trawl : 



(1) March 17— i8th, 1905, night, 57°23' N., io°45' E., depth z6 m., 8 hours pelagic haul: i glass- 

 eel (72 mm.). 



(2) March 22nd— 23rd, 1905, night, 57°2o' N„ 9°24' E., depth 9 ni., 2X4 hours pelagic hauls; 17 

 glass-eels (64—72 mm.). 



(3) March 24th, 1905, night, 56°57' N„ ii°32' E., depth 13 m., 1/2 hours pelagic haul: 7 glass-eels 

 (69 — 71 mm.). 



(4) March 24th, 1905, night, North Sea off Lodbjerg lighthouse, depth 17 m., 4 hours pelagic haul; 

 20 glass-eels. 



(5) same place, daylight, 4 hours pelagic haul; i gl ass -eel. 



(6) .same place, daylight, r hours haul at the bottom; 36 glass-eels. 



