Tosefta על חולין 1:4

One who slaughters from above, his slaughtering is valid. From below or from the sides [of the throat], his slaughtering is invalid (cf. Hul. 1:4, validating the latter). And from the nape of the neck is valid for melikah (pinching off the neck of a sacrificial bird offering). One who performs melikah from above, his melikah is valid. From below or from the sides, his melikah is invalid. Slaughtering [is performed] with a utensil, and melikah with the hand, and consequently it is said (Hul. 1:4), "[What is] valid for slaughter is invalid for melikah, [and what is] valid for melikah is invalid for slaughter." [Moreover,] the slaughter of a fowl inside [the Temple (see Zev. 85a:3)] is invalid, and the melikah is valid, [while] the melikah of a fowl outside [the Temple] is invalid and the slaughter is valid, and consequently it is said, "A valid location for slaughter is invalid for melikah, and a valid location for melikah is invalid for slaughter."