Four curved ranges running from the great boundary mountains to Meru, shaped like a bull elephant's tusks.
Gandhamādana and Mālyavān spring from Nīla and curve down to Mount Meru, enclosing Uttarakuru between them. Saumanasa and Vidyutprabha spring from Niṣadha and curve up, enclosing Devakuru.
They are 400 yojana high where they meet the boundary mountain and 500 where they meet Meru — the only ranges in Jambūdvīpa that rise as they run inward.
They also close off the kurus from the The 32 Vijayas system. Everything east and west of the tusks is divided into vijayas; everything between them is a land of enjoyment.
Traditions differ on which tusk sits on which side. The pairing of two to Nīla and two to Niṣadha is constant everywhere.
Mahāvideha and its thirty-two provinces — The four Gajadanta highlighted