H. D. Althearn

19 public-domain plates in the archive

• Obovaria subrotunda 7 Aug 1965
• Elliptio icterina 29 Apr 1969
• Quincuncina infucata 15 Nov 1957
• Uniomerus caroliniana 31 May 1965
• Villosa delumbis 9 Nov 1957
• Quadrula cylindrica 24 May 1964
• Elliptio icterina 24 Jan 1964
• Elliptio complanata 22 Sep 1970
• Ptychobranchus fasciolare 22 Aug 1965
• Elliptio complanata 13 Apr 1965
• Lampsilis subangulata 27 Nov 1958
• Elliptio complanata 30 May 1964
• Elliptio complanata 4 Jul 1965
• Actinonaias carinata gibba 24 May 1964
• Elliptio buckleyi 21 Jan 1965
• Elliptio icterina 24 Jan 1964
• Lampsilis radiata radiata 5 Jun 1965
• Megalonaias boykiniana 17 Aug 1965
• Elliptio complanata 18 Jun 1964