Nr. 9] CONTRIB. TO THE LIFE H.ISTORY OF THE FISHES 21 



remains of crustaceans and insecl larvæ in stomach and in 

 lestine. A specimen 30 cm. long from Eidsbotn, 4 /io 1911, had 

 a Macoma calcarea in the stomach; others of 10 — 15 cm. from 

 Rolshavn, Borgenfjord, 2C /s 1913, had in stomach and inlestine: 

 amphipoda, isopoda, insecl larvæ, and small gastropoda. On 

 ilounders laken in Borgenfjord it was a common thing lo see a 

 Caligus sp most frequently altached to the root of the pectoral 

 lin on the under side. 



On the } 7 1913, casting with eel sein of Steine, Byneset, 

 we found in the haul some specimens of flounder at different 

 sizes. The stomach and inteslines contained almosl exclnsively 

 Mytilas edulis. In a similar haul made at Aavikfjorden, Aasen, 

 15 /7 1913, there were 20 Ilounders ranging in size from 9 — 13.5 

 cm. with one specimen of 18.5 cm. The inlestine of the last- 

 named specimen contained a number of small Mytilus edulis. I 

 have also found these in the stomach of plaice, so thai the l\vo 

 species are evidently rivals for this particular food. From the 

 observations made up lo the present, however, I am of opinion 

 that the plaice is more of a mollusc eater than the tlounder. 



Pleuronectes microcephalus Don. 

 The lemon sole (Norw.: marilunge or langlunge) is found 

 somewhat sparsely throughoul the whole of the fjord right up 

 into Beitsladsund, and thus also in Borgenfjord, where it is 

 known as sleinbitflyndre . An illuslralion of this species will 

 be found in my second report on halching experiments, p. 74. 

 The individual in question, which was laken at Grandeviken 

 on the 28 /2 1914, was a $ 1. 44.:; cm. The eggs were very small. 

 Stomach and inlestine contained 68 specimens of Acmæa testu- 

 dinalis, ranging in size from 6 — 15 mm., also 1 Chilen, 4 poly- 

 chæt-annelida, 1 amphipod and 6 isopoda. Dredge hauls bring 

 up, as a rule, only few specimens of Acmæa testudinalis, and 

 the fact that this fish had collected nearly sevenly seems lo 

 suggest that it had soughl them out in preference lo olher food. 

 Another specimen, purchased at the fishmarket in Trondhjem, 

 21 /t 1914, had in the ventricle: LS Tectura virginea, 5 Margarita 

 groenlandica, 1 Gibbula tumida, 3 Anomia squamala, and several 

 Cliiton. It would thus seem that the lemon sole is particularly 

 addicted to such molluscs as Acmæa and Tectura virginea. 



Pleuronectes cynoglossus Lin. 



The pole-dab (Norw.: sleiplunge) is one of the lishes occa- 



sionally laken in a dredge working on soft bollom at some con 



siderable depth. During the summer of the present year (1916) we 



look specimens both at Hegdalen and Tautra. Il is not used as food. 



