Bursa lamarckii

Bursa lamarckii (Lamarck's frog shell) is a species of sea snail, a marine gastropod mollusk in the family Bursidae, the frog shells.

Description
The shell size varies between 33 mm and 80 mm.

Distribution
This species occurs in the Red Sea and in the central and west Indo-Pacific region; also off the Philippines.

Etymology
The snail is named after Jean-Baptiste Lamarck.