O. Park

48 plates

• Stenotrema stenotrema 17 Jul 1928
• Leptodea fragilis 22 Aug 1929
• Mesomphix laevigatus 21 Jun 1928
• Anguispira alternata 5 Nov 1929
• Pyganodon grandis 1931
• Neohelix major 11 Jul 1928
• Stenotrema stenotrema 11 Jul 1928
• Pyganodon grandis 23 Oct 1929
• Mesomphix inornatus 7 Jul 1928
• Viviparus contectoides 27 Oct 1928
• Lymnaea stagnalis appressa 8 Sep 1927
• Lampsilis anodontoides 22 Aug 1929
• Mesodon zaletus 11 Jul 1928
• Eurynia dilatata 5 Apr 1928
• Lampsilis siliquoidea 1931
• Mesodon rugeli 2 Jul 1928
• Anguispira alternata 2 Jul 1928
• Anguispira alternata 2 Jul 1926
• Mesomphix inornatus 11 Jul 1928
• Pyganodon grandis 1931
• Stagnicola emarginata 8 Sep 1927
• Amblema plicata 22 Aug 1929
• Anodontoides ferussacianus 11 Sep 1927
• Vitrinizonites latissimus 11 Jul 1928
• Mesomphix inornatus 2 Jul 1928
• Lasmigona costata 1931
• Triodopsis tridentata 17 Jul 1928
• Mesomphix laevigatus 26 Jun 1928
• Stenotrema stenotrema 26 Jun 1928
• Neohelix major 2 Jul 1928
• Stenotrema stenotrema 30 Jun 1928
• Strophitus undulatus 10 Sep 1927
• Potamilus alatus 22 Aug 1929
• Lampsilis siliquoidea 1931
• Pyganodon grandis 8 Sep 1927
• Lampsilis siliquoidea 8 Sep 1927
• Triodopsis tridentata 2 Jul 1928
• Mesomphix laevigatus 17 Jul 1928
• Neohelix major 21 Jun 1928
• Triodopsis tridentata 25 Jun 1928
• Lampsilis siliquoidea 1931
• Fusconaia flava 22 Aug 1929
• Sphaerium striatinum 3 May 1924
• Lampsilis siliquoidea 5 Apr 1928
• Discus perspectivus 5 Nov 1929
• Neohelix major 25 Jun 1928
• Physella gyrina 9 Sep 1927
• Neohelix major 30 Jun 1928