Shell wider than tall
The first thing is to measure it. For details of how to measure, click on the text link.
The next thing is to count the number of whorls. For details of how to do this, click on the text link.
Take a note of the measurements and the number of whorls.
If the maximum breadth is less than 8mm. AND the number of whorls is LESS than 3½, then you probably have a juvenile. If possible, it will be worth looking for a similar specimen that is larger before proceeding further.
If the maximum breadth is less than 8mm. AND the number of whorls is 4 OR MORE click on the image to the right to continue.
OR, if the maximum breadth is greater than 8mm. AND the number of whorls is 4 OR MORE, click on the image to the left to continue.