In this Indus symbol, the glyph marking the end of an area comes before the glyph marking the beginning of an area. It is an ideograph for the verb to divide. This sign shares the same root as the Chinese character bā 八.
Illustrative Text Reference:
Kalibangan: Seal: K-30 a: Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 304: Collections in India: Suomalainen Tiedeakatemia.
Image Credit:
Indus Script Sign Number 303: Sign List of the Indus Script: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.