The last foot is obviously incomplete or catalectic. The foot that consists of two syllables, the first of which is accented, is called a trochee. It is the opposite of the iambus.
Again, in the line,
"This is the forest primeval; the murmuring pines and the hemlocks,"
it will be noticed that, beginning with the first, each accented syllable is followed by two unaccented syllables, except in the last foot, which is a trochee. The scheme of the verse is as follows:
This foot, consisting of one accented syllable, followed by two unaccented syllables, is called a dactyl.
Once more, in the line,
"Through the depths of Loch Katrine the steed shall career,"