41 



ston€s, the Montagu's Sucker [Lipavis Ilontagui), has beeu caught iu a 

 dredge, and oue single time it has been taken also in an otter-seine, near Læsø, 

 on less pronounced stoue bottom. 



Of other fishes belongiug to this locality must be mentioued Centronotus 

 gunellus and the wrasses (which occur also on the zostera bottom), of which 

 particularly Cfenolahrus rupestris and Labms melops are very freqiiently caught 

 in the cod-weels. The larger, maguificent Lahrits herggylta is found also, for 

 instauce at Frederikshavn, but it seems to be much rarer. Labrus mixtiis has 

 not been caught at all iu 1897 — 98. 



Also other fishes belongiug to the zostera belt are, of course, often found 

 on the stonebanks; more particularly codfish and other migratory fishes are 

 frequently met with. 



C. The Mixed Deposits. 



The Journal- mimbers: 70, 71, 72, 83, 84, 92, 93, 102—103, 108—109, 40, 41, 62a, 114, 63a, 

 63—64, 65, 77, 101, 104, 107, 117, 118, 119, 74, 75, 99—100, aud in part 115, 112, and 55. 



The hitherto mentioued belts on shallow water are here in the northern 

 part of the Cattegat of less importance to our fisheries; the proper fishiug- 

 grounds are to be found on deeper water, on the so-called mixed deposits, 

 which everywhere as a broader or narrower belt separates the unmixed sand 

 from the clay deposits. 



This belt is of a considerable width at the Skaw and in the Aalbæksbugt, 

 where it goes quite round about Herthas Flak, extends like a broad tongue 

 through Læsø Rende, and is continued from this place in north-easterly direc- 

 tion rouud about the shallows north of Læsø as far as Trindelen, whence it 

 goes southwards. 



The depths go from 7 to about 18 — 20 fathoms ; as above mentioued, the 

 vegetation, which consists only of algæ, is not very richly developed, while, 

 on the other hånd, the fauna is rather ricli. 



Of lower animals may be mentioued particularly large numbers of sea- 

 urchins {Echinus axiå Amphkhtus), sea-stars [Asterias rnbens and A. glacialis), 

 serpent- stars [Ophiopholis aculeata), mussels (e. g. Cardium and Cyprina), 

 snails (e. g. Buccimmt, Nepfimea, Aporrhais), hermit-crabs, and chæto- 

 poda, besides numerous attached species of various classes of animals (bryo- 

 zoa, tubicoles, and actiniæ). 



The number of fish is large also, both witli respect to the number of spe- 

 cies and to the number of specimeus. Several of the most valuable fish live 



6 



