1 2 3 4 5 6 M 



Littovina littorea x x x x x x x 



Liitorina obtusata x x x x x x x 



Littorina saxatilis x x x x x x x 



Family Rissoidae 



Alvania sp. 



Alvania arenaria 



Alvania areolata 



Alvania aarinata 



Alvania oastanea 



Alvania harpa 



Alvania latior 



Cingula sp. 



Onoha aouleus 

 Family Hydrobiidae 



Hydrobia sp. x x x x 



Hydrobia salsa x x x (estaurine) 



Hydrobia totteni x x x x x x x 



Family Skeneopsidae 



Skeneopsis planorbis x x x x x x 



Family Turritellidae 



Taahyrhynaus erosa + + + + 



Turritellopsis aoioula + + x 



Family Cerithiidae 



Cerithiopsis oostulatum + 



Family Epitoniidae 



Aairsa borealis + + 



Epitonium greenlandioum + + + x 



4-E-29 



f 



c 



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