Die Medulla Oblongata und die Vierhügelgegend von Ornithorhynchus und Echidna

Abstract

DETAILED knowledge of the brain of the Monotreme has in recent years been, considerably extended by the works of Profs. Elliot Smith, of Cairo, and Ziehen, of Jena. Material suitable for successful prosecution of microscopical research in this field is necessarily rare. It is a matter for congratulation that such material should have reached the hands of a veteran histologist, Prof. v. Kölliker. His monograph deals with the arrangement of nerve-fibre bundles and of nerve-cell groups in the mid-brain and hind-brain of ornithorhynchus and of echidna respectively. The study is based on transverse sections stained with hæmatoxylin by the Weigert method for nerve-fibres. The ornithorhynchus brain furnished for the regions studied a series of 1088 sections. Detailed drawings under defined enlargement are given for sections at eighteen of the levels. Among the points of interest ascertained the following appear the chief.

Die Medulla Oblongata und die Vierhügelgegend von Ornithorhynchus und Echidna.

Von A. Koelliker. Pp. vi + 100. (Leipzig: Engelmann, 1901.) Price 16s.