III. On the development of the atrial chamber of Amphioxus

Abstract

Last year, through the kindness of Professor Lankester, I had the opportunity of spending several months—May to August—in Sicily, collecting the embryos and larvæ of Amphioxus . Since then I have been working continuously on the material I obtained in the laboratory of University College, under the direction of Professor Lankester. The period of the development, to which Professor Lankester determined first of all to give attention, was that before which Hatschek’s wrell-known work stops short.