Deviations in development

  I’ve thought where to place the information on one snail I keep. O.k. Let it be here...
  On May 11, 2001, from a laying of eggs one snail appeared. It has unusual shape. It looks like a grape snail. The width of its shell was more than its length. It grows much more slowly than other snails, but the form of its shell is rather interesting.

On the left, above: in comparison with other snail, from the same laying. On the right: such it became in the middle of summer.
Below: January 2002.