224 
shorter furrow placed anywhere between these two extremes. It 
may be transverse, oblique or horizontal in direction. It is very 
frequently interrupted by a submerged “gyrus translunatus”: and 
occasionally this gyrus comes to the surface and completely divides 
the lunate suleus into a pars dorsalis and a pars ventralis. Either - 
of these furrows may be joined to a sulcus praelunatus so as to 
form a pattern, which is at first sight somewhat perplexing.” 
I thought, it necessary to copygthe whole of the description given 
by E. Smita to make distinctly clear that in this way each sulcus 
on the occipital pole can be taken for a suleus lunatus. 
Ervior Smith came to this description of the localisation of his 
suleus lunatus, because this should form a border of the surface, 
over which the stria Gennari (Stria of Vicg. b’Azyr) should extend. 
This conception of Ermor Smita proved to be wrong later on. 
Not only does he himself already write on p. 440 that in many cases 
the area striata is always sufficiently near to the suleus lunatus, 
which does not point distinctly to a border, but moreoyer the 
investigations e.g. of BropMaNnn"’) and Murpny'’) make clear that in 
Europians the area striata is in no way connected with the furrow 
which is described by E. Smita as suleus lunatus. 
From the above said follows, that of all the characteristics, which 
an ape fissure could possess to be distinguished from the neighbouring 
furrows with regard to the suleus lunatus of Ermor Smirn, not one 
is to be found which suffices. The suleus lunatus, described by him, 
therefore can be brought back to pseudo-opercula, which frequently 
appear on the oecipifal pole and which are described e.g. by Rerzmus 
as “Halbringform”. 
CONCLUSIONS. 
1. Where in anthropoids an ape fissure is still found, theoretically 
spoken, the possibility exists that in man too an ape fissure can 
develop. 
2. Where in anthropoids the ape fissure is already importantly 
less developed than in semnopitheci, however the possibility also 
exists that a same furrow in men does not come into development. 
3. In apes all the principal furrows develop, also the fissura 
simialis, during foetal life. 
Where in man too all the principal furrows develop during foetal 
life, it may be accepted that in case an ape fissure should be formed, 
this should take place during foetal life. 
4. However where in human foetus no ape fissure is found, 
