God of the Sea.
Whether you call him Neptune or Poseidon, this god of the sea was a favorite mythological design on Victorian buttons. He is always pictured with his trident, & sometimes on a shell or with seahorses. Here are a few of his many incarnations.
I love having a large lot of buttons to pick through. This grouping had all kinds of buttons including pictures, storybook, twinkles, pressed pewter, Czech glass, waistcoat, black glass, plain brass, mother of pearl & velvet perfume buttons.
3rd picture from the top is a storybook button with a design known as the "Easter Boat Ride." It depicts 2 birds towing a 1/2 shell boat with 2 figures inside.
Several, like the navy twinkle buttons & those with a strawberry design have worked their way into bracelets, while others have been sold.