16 Tritia reticulata

16 Tritia reticulata

1: yellow mantle. 2: parietal lip. 3: flat head.

4: respiratory siphon. 5: foot.

Substantial, glossy white, semicircular parietal lip, created by mantle spreading extensively over body whorl, stained green by epizooic algae. Matt exterior also stained green.

Llŷn Peninsula, N. Wales. March 2016.