Taf. 2. 



10 



1, 2 Litorina litorea, 3 Nassa reticulata, 4, 5 Purpura lapillus, 6 Fasciolaria tarenlina, 7 Turritella communis, 



8 Cerithium vulgatum, 9 Buccinum finmarkianum, 10 Scalaria communis, 11 Neptunea norvegica, 



12 Buccinum undatum, var. acuminatum, 13 Neptunea islandica. 



