Note AH — GLOSSARY OF TECHNICAL TERMS USED IN PART I.
Reading edition
The outer covering by means of which the gemmule is fixed is not formed until the other structures are complete. In young sponges, therefore, free gemmules may often be found.
Reading edition
The outer covering by means of which the gemmule is fixed is not formed until the other structures are complete. In young sponges, therefore, free gemmules may often be found.