850 
nates the O3, the gyrus lingualis and: fusiformis to the confluence of the calcatine 
fissure with the parieto-occipital fissure (s. Psych. Bladen Pl. iV, fig. 6). Also a 
part of the gyrus occipito-temporalis, lying more proximally, is injured, 
Through this lesion the ventra! division of the geniculo-cortical radiation as 
well as that of the area of Wersicke is degenerated, but in less degree its most 
ventral layer (cf. Ps. Bladen, Pl. V, fig. 12). 
The geniculate body belonging to this is drawn in fig, 18. It is smaller than 
normal, but not as far reduced as in both the former observations. The proper 
capsule is not changed dorso-medially and the same can be said of its cells, dorsal 
as well as the ventral ones, belonging to the caput of the ganglion. 
The cauda is for the greater part alrophied but not the most laterally situated 
division of it. There, ventral and dorsal cells are to be seen within an almost nor- 
mal capsule. Between caput and cauda, not or only little changed, one finds in 
the middle a part, where «ll is detroyed; the dorsal and ventral cells, the striae 
medullares, the proper fibres and the proper capsule. 
In this case an example is shown of an icomptete atrophy of the 
cauda of the lateral geniculate body, incomplete because the focus 
did destroy the ventral occipital convolutions, but had not touched 
the gyrus occipito-temporalis far enough proximally. Therefore the 
most ventral layers of the geniculo-cortical radiation and the most 
lateral parts of the cauda remained free from degenerative atrophy. 
Recapitulating [ come to the following conclusions : 
1. Vision in the upper quadrants of the field of vision is possible, 
notwithstanding the total loss of all the cells and fibres in the medial 
(caput) division of the crossed lateral geniculate body, as long as the 
cells and fibres of the cauda (origin of the ventral geniculo-cortical 
radiation) are intact. . . 
2. Ht is not sufficient that the ventral occipital convolutions ‘are 
destroyed to make all the cells disappear out of the lateral (cauda) 
division of the geniculate body. This only occurs when more proxi- 
mally situated parts of the gyrus occipito-temporalis are destroyed, 
3. The cortical areae belonging to the lateral geniculate body 
are not only limited to the cortex of the occipital lobe. 
Chemistry.) — “On the occurrence of metals in the liver. By 
Prof. I. van Traum and Dr. J. J. van Ecx. (Communicated 
by Prof. EINTHOVEN). 
(Communicated in the meeting of November 30, 1912). 
In: the analysis of organs as to the presence of metallie poisons, 
we found in the liquid obtained after destruction of 170 grams of 
liver, kidney and heart, in addition to traces of arsenie and copper, 
as much zine as corresponds with 80 mgs. of zine oxide per kilo- 
gram of organs. As there was no reason to suppose that a poisoning 
