Pemberton, Structure of tlic Optic Thala))ii. 145 



" red nucleus." In other mammals there is a slight bend, but 

 in the mouse the course is nearly a straight line at this point. 

 Honegger distinguishes ['' p. 405] two kinds of fibres in 

 Meynert's bundle. The carmine stain affects one kind of 

 fibres, making them more or less red, while the other kind 

 remains unstained. For v6ntral connections of this bundle 

 see " Interpeduncular Ganglion." 



Infundibular Tract. — Goronowitsch's investigations on 

 the brain of Acipenscr show us ['" p. ^49] that the fibres in 

 the peripheral part of the infundibular lobes run parallel to 

 the surface. In the central portion the fibres are more defi- 

 nitely marked, and consist of two systems. One has its 

 fibres parallel to the surface, as in the peripheral layer; the 

 other crosses the first at right angles, thus having its fibres' 

 pei'pendicular to the surface. By means of their fibre-con- 

 nections, the lobes are put into direct association with the 

 prosencephalon. A distinct tract ['' p. 550] of non-medullary 

 fibres from the infundibular lobes passes to a ganglionic body 

 in the wall of the mesencephalic ventricle. Osborn traces 

 [' P- 79] ^'^^ tract cephalad, in the amphibians, beneath the 

 basal prosencephalic tract towards the hemispheres. In 

 Rana it has the appearance of entering the thalami, but 

 " not in the Urodcla, where it appears to pass directly 

 forwards and not upwards." 



Mamniillary Body., Corpus Candicans. — The position of 

 this structure just below the thalami, and its connection with 

 the tegmental bundle, and the bundle of Vicq d' Azyr, both 

 of which pass through or by the thalamus, bring it into 

 notice in this article. It is particularly well developed 

 ["' P- 34^] ''^ t^^^ ^^^1 ^he dog, the monkey, the rabbit, and 

 in man. Fritsch thinks that it is homologous with the infe- 

 rior lobes of the teleosts. Its main connection, as far as we 

 are here concerned, is with the two bundles just mentioned 

 above, but the pillar of the fornix also enters it, having, 

 however, no functional connection with the bundle of Vicq 

 d'Azyr, according to the careful and systematic pathological 



