NORMAN : ON THE MOLLUSCA OF BERGEN FIORDS. 35 



The foregoing table will, with respect to the majority of the 

 species which it contains, supply sufficient information. I shall 

 in the following notes refer to only a few of the mollusca which 

 are found in the British Seas, and described in Jeffreys' " British 

 Conchology," but give references — always to a good figure when I 

 know one — for such species as are not so well known to British 

 conchologists. 

 3. Argiope cistellula, (S. Wood). Found on the south side 

 of Kors Fiord, off the bluff cliffs just west of the islet marked 

 in the chart "Skaarhl." The strata of the rocks here are 

 almost perpendicular, and dip, with a slight northerly or out- 

 ward slope, right down into the abyss, and thus within loo- 

 200 yards of the shore the dredge is dropped in i8o fathoms 

 (Station 23). From this position the dredge was drawn 

 shoreward, and the boat was sometimes moored to the rocks 

 as the dredge was being hauled up the perpendicular slope 

 of the submerged cliff. This slope forms a magnificent pre- 

 serve for sponges, &c.; while the debris at the bottom is very 

 rich in small and rare mollusca, as will be evidenced by a 

 reference to column 23. Among these small, rare mollusca 

 dead but perfect sj^ecimens of Argiope cistellula are not un- 

 frequent. 



11. Pecten varius, (Lin.) At low water and Laminarian Zone 

 Islet of Bukken. The occurrence of this Pecten on the 

 Norwegian coast is of much interest, since in the British Seas 

 the typical form is not found anywhere on the Scotch coast, 

 though the species (or " variety," Jeffreys) P. nivea is Hebri- 

 dean ; and Jeffreys says that an intermediate variety is to 

 be met with at Jura. The typical dark-colored P. varius, 

 such as is found at Bukken, is however with us a southern 

 form. Bukken is its most northern habitat. 



12. Pecten aratus, (Gmelin). 



Pecten sulcatus, Miiller, Zool. Dan. Prod., No. 2995 (not 

 Pecten sulcatus, Chem.). 



