Page:Popular Science Monthly Volume 55.djvu/325

Rh mollusk from the upper Yukon, and to all inquiries regarding the existence of shellfish in this northern water invariably a negative reply was received. Only on that day did I again obtain success



in my malacological effort, the almost icy waters rewarding my search with a single specimen—unfortunately subsequently lost—of a Bythinella, or some closely related type, so that even to-day my