Manual of Conchology, Structural and Systematic, Vol. 13 (Classic Reprint): With Illustrations of the Species; Acmædæ, Lepetidæ, Patellidæ, ... Patellidæ, Titiscaniidæ (Classic Reprint) - Softcover

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Excerpt from Manual of Conchology, Structural and Systematic

The shells are excessively variable, as is usually the casein seden tary mollusks. The author has examined very large suites of specimens, including nearly every species and variety described from the waters of North and South America, both east and west, and of Japan, Polynesia and Europe. The Australian and New Zealand forms are known to me by fewer specimens, and a number of the species of those regions I have not seen.

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