peristome in a sentence

Examples

1. The peristome ribs are well developed, being up to 2 mm high.
2. The flattened peristome is up to 6 mm wide.
3. The peristome is greatly reduced and bears smaller teeth.
4. The flattened peristome bears ribs spaced 0.5 to 1 mm apart.
5. The aperture or peristome of the shell may be simple or variously modified.
6. The peristome is white, broadly expanded and reflexed.
7. Peristome is continuous, somewhat expanded, little thickened.
8. The peristome is continuous, not closely appressed at the upper left side.
9. The peristome ranges in colour from green to red.
10. The peristome is thin, though slrongly ribbed exteriorly.