On the Varieties of the Shells: Belonging to the Genus Nassa, Lam (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from On the Varieties of the Shells: Belonging to the Genus Nassa, Lam

The study of variation has opened up a subject so vast in its dimensions that the mind almost shrinks from the task of estimating it. In every direction variation extends, in every way variation seems to ramify, until we gaze and wonder if there be any end.

Instead of 200 Species, at least Varieties are before me, and the end appears nearly as far off as ever. Taking a careful survey of the shells under consideration, and noting more particularly the common forms and the changes presented by them, we are enabled to form an estimate of the enormous number likely to be met with, if we persevere in our work of collecting varieties.

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