"Colony of Hydractinia on back of a Buccinum shell tenanted by a hermit-crab." -Thomson, 1916

Hydractinia

"Colony of Hydractinia on back of a Buccinum shell tenanted by a hermit-crab." -Thomson, 1916

"White whelk (Buccinum undatum)." -Taylor, 1904

White Whelk

"White whelk (Buccinum undatum)." -Taylor, 1904