The tectum (Tec) appears in the following sections (posterior to anterior) of the macaque brain (Macaca fascicularis)
Medial

Medial

ac -17 mm

ac -17 mm

ac -16 mm

ac -16 mm

ac -15 mm

ac -15 mm

ac -14 mm

ac -14 mm

ac -13 mm

ac -13 mm

ac -12 mm

ac -12 mm

ac -11 mm

ac -11 mm

ac -10 mm

ac -10 mm