IX. On the occurrence of glycogen as a constituent of the vesicular cells of the connective tissue of molluscs

The following results were obtained in connexion with a research “On the Connective Tissue and Vascular System of Mollusca,” on which I acted as assistant to Professor Lankester, according to the terms of a grant from the Government Grant Committee of the Royal Society: other results will be published subsequently. The connective tissues of Molluscs, as presented by Helix, Planorbis, Anodon, Cyclas, and Solen, may be divided into two main groups. In one of these the constituent cells are little advanced from their original mesoblastic condition; they have an irregular stellate form, and they are joined together by the tips of their processes. In the other variety, which will be spoken of as lamellar connective tissue, the cells are more irregular in form and their processes more attenuated, but, by the deposition of an inter-cellular ectoplasm in certain planes, the cells come to lie in plates or films.