Shell wider than tall

The first thing is to measure it. For details of how to measure,  click  on the menu item to the left.

The next thing is to count the number of whorls. For details of how to do this, click on the menu item to the left.

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 3˝, then you probably have a juvenile. If possible, it will be worth looking for a similar specimen which is larger before proceeding further.

Shell less than 8 mm. broad

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.

Shell more than 8 mm broad

OR, if the maximum breadth is greater than 8mm. AND the number of whorls is 4 OR MORE, click on this image  to continue.