Abstract:

A. There existed a few neuro-insular complexes in the pancreas of some adult mammals, and there was a difference among species. The complex was more in dog and guinea pig and less in rabbit. Inlerlobular complexes were much more than those within the lobule.B. According to the organization of the complex and the relation between pancreatic islet cells and autonomic ganglion cells, the neuroinsular complex may be divided into four types;(1)Type A: Islet cells intermingle with ganglion cells. There was no distinct connective tissue septum between the two kinds of cells.(2)Type B: Some ganglion neurons were situated adjacent to an islet of Langerhans, and a thin connective tissue septum could be seen in between the two kinds of cells.(3)Type C: Groups of islet cells were on the surface of, or within the nervebundles.(4)Type D: A mass of islet cells associated themselves with nerve cells on one side of the complex and with nerve fibers on another.