Left: interior view.
Dark viscera visible through translucent foot. Red/pink of odontophore visible in head. White pallial tentacles visible bottom left against brown band on shell.
Right: exterior view.
The thin, transparent, juvenile shell shows the green mantle and the central, dark, amphora-shape mark on the interior of the shell.
This 2mm specimen in August is a product of breeding earlier in spring or early summer of the same year.
APPENDIX re range advance/retreat: flic.kr/p/2jW74ig