1)
What is the meaning of "l'Galim"?
1.
Rashi: Degorin. (It seems that this was Rashi's text of the Targum, like Targum Yonasan of Gal (Yehoshua 7:26), i.e. a pile. - PF)
2.
Radak: They are piles of rocks from the destroyed houses and walls.
2)
What is "Me'on Tanim"?
1.
Radak: It is the habitat of Tanim; Yonason translates this to be Yerodin 1 .
2.
Malbim (Mal'achi 1:3): It is a kind of snake.
1
Rashi (Yeshayah 34:13, Kesuvos 49b): It is an evil Chayah. It is cruel to its young.