Further observations on the locomotor system of medusæ

Abstract

Abstract 1. Fundamental Observations on the Naked-eyed Medysæ.—The observation which, in my last paper, I designated the “fundamental observation,” has been this year repeated numberless times, both on the old species of naked-eyed Medusae and also on some new ones. The result has been in every case to confirm the rule previously enunciated, namely, that “excision of the extreme margin of a nectocalyx causes immediate, total, and permanent paralysis of the entire organ.” 2. Fundamental Observations on the Covered-eyed Medusæ.—Regarding the covered-eyed Medusae, it is necessary to say that I have this year confirmed all the observations which required confirmation from the fact of their having been at variance with those of Dr. Eimer.