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Body of the shell is the first or lower whorl of the spire, in which the aperture is situated, and is in general longer than the remaining whorls. Plate II. figs. 10 and 12, F F; and Plate III. figs. 7 and 9, F F.

Front of the shell is that side where the aperture is situated. Plate II. fig. 7, I; and Plate III. fig. 8, I.

Back is the opposite side to that in which the aperture is placed or turned directly from the observer. Plate III. figs. 5 and 10, G G.

The venter, or belly, is the most prominent part of the lower whorl or body, generally situated in the vicinity of the lip over the aperture; and formed by the convexity of the aperture. It is in general only made use of in describing shells whose body is large in proportion to the size of the spire. Plate III. figs. 5 and 10, H H.

Sides. The extreme edges of the shell, when viewed either in front or from the back. Plate II. fig. 11, K K K K K K K K. Right side is, when the shell is viewed in front that side next the observer’s left hand. Left side, the side with the aperture in it.