Keywords: Geomalacus maculosus 4.jpg Black and white photo of Geomalacus maculosus shows that this species has protective coloration among lichens Taylor J W 1907 http //www archive org/details/monographoflandf814tayl Monograph of the land and freshwater Mollusca of the British Isles Testacellidae Limacidae Arionidae Taylor Brothers Leeds page 258 1907 Robert Welch aka Robert John Welch 1859-1936; Ireland Published by John William Taylor 1845-1931; UK PD-old-70 PD-old-auto-1923 1936 Geomalacus maculosus Images by Robert John Welch |