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tudes sur les mollusques terrestres et fluviatales du Mexique et du Guatemala Pl. XXII . Expd ScienU du MeJjue loloaie Partie Il Ffc del Anafomie de Buhmulus el Biiliniiur Inw Salnwn VieiJ Ejf'apaf ris Pl XXII Illustration biodiversitylibrary org title Crosse Hippolyte Fischer Paul Henri MilneEdwards Biodiversity