Literary Notices. xxiii 



of symmetrical folds originating cephalad. Each of the neuromeres gives 

 rise to a pair of sensory nerve roots. The mesencephalon supplies the 

 third and fourth nerves. There are six brain segments in the nietenceph- 

 alon and two in the primary prosencephalon, making ten in all, agreeing 

 with Von Wijhe's view that there are nine cephalomeres. 



Dorsal Longitudinal Fasciculus, i 



The dorsal longitudinal fascicle is strongly developed in turtles, 

 forming two strong protuberences in the fourth ventricle, and may be fol- 

 lowed distinctly through the whole cord. It lies dorsad of the ventral 

 commissure. It consists of large fibres, among which, in the caudal 

 region, is a large cord like the Mauthner fibre of fishes. In the medulla 

 there is a combination of the large-fibred fascicle, which is distinct in the 

 cord, with the dorsal longitudinal fascicle. These two bundles together 

 represent the Miiller's fibres or, in general, the large fibres of the lower 

 animals. 



Thalamus. '- 



Nissl distinguishes a number of niduli in the thalamus of the rabbit. 

 The method was alcohol hardening and staining with basic analins. The 

 cephalo-ventral nidulus is divided into a dorso-mesal and a ventro-laleral 

 portion. Mesad from this anterior nidulus is the small meso-cephalic 

 nidulus, which lies like a cap on the meso-median nidulus. The latter 

 lies close to the median line and may be followed half the length of the 

 thalamus. Ventrad of the anterior nidulus is the nidulus of the lattice- 

 layer, "Kern der Gitter Schicht," close upon the median line 

 lies the- nidulus of the median line. The cephalo-lateral 

 nidulus which lies in the lateral protuberance of the thalamus, 

 occupies nearly two-thirds the length of the thalamus and consists of 

 the largest cells. Mesally it impinges on the large meso-caudal nidulus. 

 Between the ventral and dorsal lattice nidulus is the very large ventral 

 nidulus, which occupies about the posterior one-half of the length of the 

 thalamus. In the ventral nidulus the lateral group contains spindle-cells, 

 the median contains large cells and the dorsal small ones. 



1. Koeppen, Tageblatt d. 62 Versaminl. deutsche Naturf. u. Arzte in Heidelberg. 



2. Die Kerne des Thalamus beim Kaninehen. Tageblatt der 62 Versaiuuilung 

 deutscher Katurf. und Arzte in Heidelberg. 



