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tudes sur les mollusques terrestres et fluviatales du Mexique et du Guatemala Pl. LVII . jcpd scienli du ey ja Zoo ie ' partie PL oa MS jcc ' ' S' n' ti Arrwiil fjlel euliL linpriTueri ational Ilelicina Pl LVII Illustration biodiversitylibrary org title Crosse Hippolyte Fischer Paul Henri MilneEdwards