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Salmon-Colored Pearl, weighing 14 1/2 pearl grains, lying loose where it was formed in a shell, from Linn Junction, Iowa. The pearl is nearly hemispherical, or 'button-shaped,' somewhat one sided, but perfect above. It occupied a depression at the posterior end of the right valve, and had caused a marked outgrowth or protuberance of the other valve.
B-Valve with the pearl removed, showing the depression where it had lain. C- The pearl itself taken out. D-Exterior view of the left valve, showing the protuberance corresponding to the pearl

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