Diagram of a Starfish
A diagram of a radiata (the starfish) whose organization is much less complete than that of most other animals. Label: 1, mouth.
GalleriesSea Urchins and Sea Stars
Cutter, Calvin First Book on Analytic Anatomy, Physiology and Hygiene, Human and Comparative (Philadelphia: J. B. Lippincott & Co., 1875) 34