HMM check out this cacti. This was right next to mine, was labelled as Peruvianus as well. Maybe these pics will help further. Again i appreciate the effort guys. I really like to know what i have even if its not active.

This cacti attached is my brothers purchased the same day.

Archmage i agree the yellow color looks similar but i think thats just from lots o sun. Notice on page 368 that the areola's are more inset in a sort of V wedge. BUT maybe its just growth differences but the same strain.

Hostilis, i cant find a straight answer on activity in the Cuzcoensis or not. According to Trout if im reading this book right, there is .5-5% mescaline per 100g fresh.