• publisher: Philadelphia, Pub. by the author
  • creator: Tryon, George Washington, 1838-1888
  • Keyword: Mollusks.
  • years: 1885-1935.
  • pages: 28 v.
  • notes: Vol.5-28 continued by Henry A. Pilsbry (v.21-25 with Alpheus Hyatt and C.M. Cooke)
  • download: pdf file