Victoria University of Wellington Library
Title: A Guide to the Freshwater Mollusca of New Zealand
Author: M. J. Winterbourn
In: Tuatara: Volume 20, Issue 3, November 1973
Publication details: Wellington
Part of: Tuatara : Journal of the Biological Society
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Plate 3: Figures 17–19: Ferrissia neozelanica, lateral, ventral and dorsal views. Figures 20, 21: Ferrissia dohrnianus, lateral and dorsal views. Figure 22: Planorbarius corneus. Figures 23, 24: Gyraulus corinna, lateral and dorsal views. Figure 25: Gyraulus kahuica.