"Helix. B, the relation of the animal to the shell when extended...a, apex of shell; an., anus; e, eyestalk; f, foot; l, lip of shell; m, edge of mantle, which secretes the shell; r.a., respiratory aperture; t, tentacles." -Galloway, 1915

Helix Snail

"Helix. B, the relation of the animal to the shell when extended...a, apex of shell; an., anus; e, eyestalk;…