polypoid

Updated: May 1, 2025

Furnished with these facts, it is not difficult to recognize true beroidal forms in the embryos of sea-urchins and star-fishes, published by Muller in his beautiful plates, and thus to trace the medusoid origin of the echinoderms, as the polypoid origin of the medusae has already been recognized.

Elizabeth Cabot Cary Agassiz - Louis Agassiz: His Life and Correspondence