Proceedings of the Zoological Society of London · 1883 · 88 citations · 0 references
Life SciencesAnatomyZoologyComparative AnatomySculptureFreshwater Mollusk ZoologyMolluscan BiologyMolluscan ZoologyMolluscan AnatomyMolluscan Comparative AnatomyMolluscan Life HistoryMolluscan MorphologyMolluscan Shell MorphologyMolluscan SystematicsOrnamental Mollusks
This differs from any other species known to me in being devoid of sculpture, and in having a conspicuous umbilicus.