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ID: b1133187
Acorn barnacle, Megabalanus tintinnabulum,from Darwin's A monograph on the sub-class Cirripedia
ID: b1133187_1
ID: b1133187_2
Stalked, or goose barnacles, from Darwin's A monograph on the sub-class Cirripedia
ID: b1133187_3
Larvae, first stages of barnacles, from Darwin's A monograph on the sub-class Cirripedia