https://c8.alamy.com/comp/REBAW3/the-conchologists-exchange-mollusks-ii-the-conchologists-exchange-what-next-why-just-this-after-may-ist-1888-we-will-give-each-subscriber-sending-us-50-cents-a-premium-in-choice-land-fresh-water-oe-marine-shells-make-your-choice-of-either-of-the-three-kinds-mentioned-send-us-50-cents-by-postal-note-and-we-will-send-you-post-paid-quotthe-conchologists-exchangequot-for-one-year-and-a-neat-box-containing-25-cents-worth-of-choice-shells-as-a-premium-or-berhn-h-wrights-new-check-list-of-north-american-unionidae-and-other-fresh-water-bivalves-just-issued-or-d-d-REBAW3.jpg