Libbie Henrietta Hyman, was an American zoologist. She wrote numerous works on invertebrate zoology and the widely used A Laboratory Manual for Comparative Vertebrate Anatomy.

Annelids, also known as segmented worms, are animals that comprise the phylum Annelida. The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist i