12 PROF. A. H. GARROD ON THE BRAIN 
The results arrived at by MM. Leuret and Gratiolet! tend strongly in the same 
direction as those subsequently arrived at by Dr. Kreug; nevertheless there is a com- 
pleteness about the investigation of the last-named author which greatly increases the 
importance of his work. 
As it is my intention on the present occasion to employ the nomenclature adopted 
by Dr. Kreug, I cannot do better than introduce it by applying it to the description of 
the typical Artiodactylate brain as represented by that author. 
Perhaps no nearer approach to this type can be given than that of the foetal sheep (Ovis 
aries), 27°5 centimeters in length, figured by Dr. Kreug (figs. 1-3). Putting what is to be 
seen in words, the small upward-directed processus acuminis (sac) of the Sylvian fissure is 
just seen on the outer border of the superior surface of the cerebral hemisphere, along 
Fig. 2. Fig. 3. 
Sheep’s brain: fig. 1. Outer aspect ; fig. 2. Superior aspect; fig. 3. Inner aspect. (After Dr. Kreug.) 
which latter surface the supra-sylvian fissure (ss) courses longitudinally nearly from end to 
end, slightly concave outwards opposite the sylvian fissure. According to Dr. Kreug, 
this fissure (ss) has three limbs; but four seems to me to be the more correct number. 
Of these one is anterior (ssw), the second superior (sss), and the third posterior (ssp). 
The fourth, according to me, runs downwards (ssd) from the spot of origin of the poste- 
rior limb. ‘Typically, all these processes terminate freely. 
Next in importance, on the superior surface, is the coronal fissure (co), longitudinal 
in direction, at no great distance from the middle line of the brain, and situated so far 
forward that its posterior extremity is in front of the superior limb of the supra-sylvian 
fissure (sss). It runs forward almost to the anterior margin of the hemisphere. 
A minor longitudinal (/afera/) fissure (1) tends to divide the surface between the 
posterior branch of the supra-sylvian fissure and the middle line of the hemisphere 
into two equal parts. The presylvian, diagonal, and posterior fissures, though they 
appear on the superior surface, are so much better seen in the lateral view of the 
brain that they will be there described. 
The inner aspect of the hemisphere presents, besides the hippocampal fissure (h), a 
long fissura splenialis (sp), or calloso-marginalis, some distance from the superior margin, 
curved concavely towards the corpus callosum, opposite the hinder end of which its 
1 «Anatomie Comparée du Systeme Nerveux,’ Paris, 1839-1857. 
