Albert Barnes Commentary Joshua 16:5-8

"And the border of the children of Ephraim according to their families was [thus]: the border of their inheritance eastward was Ataroth-addar, unto Beth-horon the upper; and the border went out westward at Michmethath on the north; and the border turned about eastward unto Taanath-shiloh, and passed along it on the east of Janoah; and it went down from Janoah to Ataroth, and to Naarah, and reached unto Jericho, and went out at the Jordan. From Tappuah the border went along westward to the brook of Kanah; and the goings out thereof were at the sea. This is the inheritance of the tribe of the children of Ephraim according to their families;" — Joshua 16:5-8 (ASV)

From the abrupt way the statements are introduced, as well as from their imperfect nature, it is a probable conjecture that some words have, in these verses, been lost from the text. Few of the places are known for certain.