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Chapter 3 —A specimen considerably resembling the T. subundata of Sowerby, in the undulated line of the edges of the valves; but it is a much more depressed shell, and of a much less rounded form.
In the young state, the undulation of the edge is not very distinct; but this character increases with age, so that in the young state, it appears like a totally different species from the adult.
Chapter list
7 chapters total
- Chapter 1Chapter 1 No.1
- Chapter 2Chapter 2 Near the base it is bent at an angle of about 45 degrees.
- Chapter 3Chapter 3 —A specimen considerably resembling the T. subundata of Sowerby, in the undulated line of the edges of the valves; but it is a much more depressed shell, and of a much less rounded form.
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