III. Preliminary note on the structure, development, and affinities of phoronis

Abstract

Owing to the time that must necessarily elapse during the prepara­tion of plates, it has seemed to me advisable to publish the following preliminary account of my observations on the anatomy and develop­ment of Phoronis. These studies were made for the most part in the Zoological Station at Naples. I am much indebted to Dr. Anton Dohrn for his great kindness and assistance.