The odor elevation

Tuberculum olfactorium

Small, in humans barely perceptible, elevation anterior/rostral in the substantia perforata anterior.
Tuberculum olfactorium is counted as the ventral striatum
The gray matter in the tube. Olf. passes dorsally into the nucleus accumbens and contains calleja islets

In animals with a well-developed sense of smell, tuberculum olfactorium is relatively voluminous.