Complex sentence: He discovered and described over 130 species of new mollusca, mainly in the Volutidae and Trochidae, and more than 30 species have been named after him by scientists from all over the world.
Split into simpler sentences: He discovered and described over 130 species of new mollusca, mainly in the families Volutidae and Trochidae. More than 30 species have been named after him by scientists from all over the world.