
Small periwinkles - Melarhaphe neritoides
Checking back my photos from past years I noticed here a few small snail shells, hidden in the barnacles' holes. I even don't know how to start the search! I could not find any information that would give me any direction. I will be happy if anyone can help.
Correction: I am happy to identify them with the help of my friends from the Facebook group "Mollusca in Bulgaria"

''Melarhaphe neritoides'', common name : the small periwinkle, is a species of small sea snail, a marine gastropod mollusc in the family Littorinidae, the winkles or periwinkles.
This species was previously known as ''Littorina neritoides''.
''Melarhaphe'' is a monotypic genus, in other words, this is the only species in that genus.