Petrus Thomae, QQ de esse intelligibli, q. 2 a.1 (ed. me):
Distinctio est ista: intellectualitas, intellectivitas, intelligibilitas et intellectitas hoc modo se habent, nam prima duo respiciunt suppositum intelligens, alia vero duo obiectum quod intelligitur. Dico ergo primo quod prima duo respiciunt suppositum quod intelligit, tamen differenter, nam intellectualitas respicit naturam qua suppositum dicitur intelligibile; sed ipsa intellectivitas respicit principium vel virtutem vel potentiam qua vel per quam suppositum potest in talem actum exire. Alia autem duo respiciunt obiectum similiter diversimode, quoniam intelligibilitas ponit in obiecto solum aptitudinem intelligendi; sed intellectitas ponit circa idem obiectum respectum actualem ipsius obiecti intellecti ad actum.
Translation:
"The distinction is this: intellectuality, intellectivity, intelligibility and intellectness(!) are related in this way: the first two are said of an understanding supposit, but the other two are said of the object which is understood. I say first that the first two are said of the supposit which understands, nevertheless differently, for intellectuality looks to the nature by which a supposit is said to be intelligible, but intellectivity looks to the principle or power by which or through which the supposit is able to go into such an act. But the other two look towards the object, likewise in diverse ways, since intelligibility posits only an aptitude of understanding[perhaps it should be intelligi] in the object, but intellectness posits in the object the actual relation of the understood object to the act of understanding."
Gotta love "intellectitas". For quite a while I wasn't even sure if I was expanding the abbreviation correctly, but this Salamanca ms. spells it out without any contraction marks. As it turns out, the entire article is about the relation between intellectitas and intelligibilitas, which in turn is the source of Peter Thomae's (And Alnwick's for that matter) disagreement with Scotus on the production of creatures in intelligible being.
