Illustrated species account of Trivia monacha (da Costa, 1778) (Mollusca, Littorinimorpha). left) https://flic.kr/p/CEqony shell glazed. 1: shell height 11.2 mm. 2: columellar region a concave furrow. 3: slight mound marks position of enveloped apex.

Revised, illustrated species account of Lacuna pallidula (da Costa, 1778) Identification and Biology, (Mollusca, Littorinimorpha). If previous version downloaded please delete it. https://flic.kr/p/2kNL1A2 Lacuna parva shell is white often with three

Illustrated species account of Crepidula fornicata (Linnaeus, 1758) Mollusca, Littorinimorpha. left) https://flic.kr/p/iHTKuN Male on larger female. Reniform outline. Body whorl forms almost all of shell. Thin, wavy red-brown lines radiate from small