Manual of Conchology; Structural and Systematic, Vol. 1 of 3: With Illustrations of the Species; Helicidæ: Vol; I (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Manual of Conchology; Structural and Systematic, Vol. 1 of 3: With Illustrations of the Species; Helicidæ: Vol; I

Shell Spiral, elongated, bulimiform, turbiniform, trochiform, depressed, lenticular or planorbiform, usually thicker than in the Zonitidae, and also less transparent than in that family; the aperture either edentulous or armed with teeth, the lip usually reflected.

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