Complex sentence: The Scotch Bonnet ("Semicassis granulata"), or ridged bonnet, is a medium-sized species of sea snail, a marine gastropod mollusc in the subfamily Cassinae.
Split into simpler sentences: The Scotch Bonnet ("Semicassis granulata"), or ridged bonnet, is a medium-sized species of sea snail. The sea snail is a marine gastropod mollusc in the subfamily Cassinae.