Freiburger historische Bestände - digital

152

Cunningham Memoirs.

4. Male (centenarian) (fig. 17).—Single anterior limb. In the figure
this is hidden by the sutural bars of bone. It begins at the postero-superior
corner of the great wing of the sphenoid and extends upwards and forwards
behind the coronal suture. Its extremity intersects the coronal line, but can
hardly be said to extend in front of it.

5. Elderly female (fig. 15).—In this head the spheno-parietal suture
is extremely short. Both ascending and horizontal limbs are present on
the outer surface of the hemisphere. The base of the ascending limb is
6 mm. behind the coronal suture. From this it extends upwards and forwards
, and is crossed at the junction of its upper and middle thirds by the
coronal suture. The horizontal limb runs along the upper border of the
great wing of the sphenoid, and is crossed near its commencement by the
coronal suture.

6. Female, thirty-Jive years old (fig. 13).—Both the ascending and the
horizontal limbs are present on the outer surface of the hemisphere, but
both are covered in the figure by the bars of bone. The ascending limb is
for the most part placed behind the coronal suture, but it is crossed by the
sutural line near its extremity. Its base corresponds with the postero-
superior angle of the great wing of the sphenoid. The horizontal limb
runs along the upper margin of the great wing of the sphenoid.

Children from Eleven to Fifteen years old.

The three heads of this period in which I have studied the cranial topography
of the anterior limbs of the fissure of Sylvius are figured in Plates
vi. and vii. (figs. 9, 10, and 11).

1. Youth, fifteen years old (fig. 11).—In this head the horizontal limb
is completely on the orbital surface of the hemisphere. The ascending
limb in the figure is covered by the coronal bar of bone. In its lower two-
thirds it lies immediatel}T behind the coronal line ; while its upper third is
placed immediately in front of the suture.

2. Boy, twelve and a-half years old (fig. 10).—Single anterior limb alone
present. Its base is placed behind the coronal line, but as it extends
forwards and upwards it intersects the sutural line, so that two-thirds of