( 938 ) 
If | am right in my conception, that the degenerated fibres in this 
case (the borders of the calcarina are intact) are dependent on the 
destruction of the thalamus and not on the pressure of the enormous 
tumour on the dorso-lateral portion of the strata sagittalia, there are 
at any rate strong grounds in favour of it. For the patient showed 
no symptoms of alexia and there is a continous connection between 
the tumour in the thalamus and the degenerations having their 
origin there. 
But if this conception be true, this case would apparently aid to 
support the opinion that in Nirss1’s fovea-zone, there entered likewise 
fibres from the periphery of the retina. For in the case, as described 
above, the shapes were recognized in the fovea. 
If the conditions presented in this case, allow the conelusions 
that whilst the perception of light was retained, shapes could not be 
recognized hemianoptically, then it must be conceded likewise that 
Niessr’s fovea-zone contributes also to the vision of shapes with the 
periphery of the retina. 
And this being so, it must be conceded further, that the light- 
impulses in themselves are insufficient for the recognizing of shapes, 
that it is only in their connection with other impulses, a@ connection 
prepared within the thalamus, that they become able to communicate 
to definite portions of the cortex the data, enabling this latter to 
recognize shapes. 
LEGENDA OF FIGURES. 
a.l.=ansa lenticularis. AM=cornu Ammonis. ag = Aquaeductus Sylvii. AVG = gyrus 
angularis. br.c.=bracchium conjunctivum cerebelli. c.=sulcus centralis. c.a.=com- 
missura anterior. C. 4. =gyrus centralis anterior. c.a. f. =columna ascendens fornicis. 
calc.=fissura calcarina. c.c.= corpus callosum. c. ert. =capsula externa. c, extr.=cap- 
sula extrema. c.g.e. of c.g./.=corpus geniculatum externum sive laterale. c.7.=cap- 
sula interna. c/.=claustrum. c.m.=sulcus calloso-marginalis. C.M.—gyrus calloso- 
marginalis. C.P. =gyrus centralis posterior. c.q. a. —corpus quadrigeminum anticum. 
C.R.=corona radiata. C. U. N.=gyrus cuneus. f.=tfornix. fj =sulcus frontalis 
primus. Fi=gyrus frontalis superior. f,—sulcus frontalis secundus. Fi = gyrus 
frontalis secundus. Fin =gyrus frontalis inferior. f.o.—=fasciculus fronto-occipitalis. 
f.r.=fasciculus retroflexus. FUS= gyrus fusiformis. h—sulcus Hippocampi. H= gyrus 
Hippocampi. hab. =habenula. /VS.=insula Reylii. i.p.—sulcus interparietalis. /=lem- 
niscus L1= globus pallidus nuclei lentiformis. Ly, £3 = putamen nuclei lentiformis. LJ= 
gyrus Lingualis. m.c.—nucleus caudatus. 2. ant=nucleus anterior thalami. 72./.= 
nucleus lentiformis. 7. /at.=nucleus lateralis thalami. 7. med, — nucleus medialis 
thalami. 7». ventr. =nucleus ventralis thalami. 7. ref, = nucleus reticularis (Gitter- 
schicht) thalami. z.r.= nucleus ruber. 0; =sulcus occipitalis primus. O; = gyrus 
occipitalis primus. 0,=sulcus occipitalis secundus. O11 = gyrus occipitalis secundus. 
o,=sulcus occipitalis tertius. Omr = gyrus occipitalis tertius. o.p. —sulcus occipito- 
parietalis. of— sulcus occipito-temporalis. O7= gyrus occipitu-temporalis. Pi = gyrus 
parietalis superior. PAR =gyrus paracentralis. ~.c.=sulcus post-centralis. p.P.= 
pes pedunculi p.o.=sulcus parieto-occipitalis. ~.r. sulcus praecentralis, PRC. = 
gyrus praecuneus. p.s.= sulcus parietalis superior. S=fissura Sylvii. SM. = gyrus 
