And perhaps here is the best place to explain the activation of the shells or coria.
Lugur and his others awakened from their nightmare; piled into the coria, wheeled, raced away.
Quickly we passed on; drew away from the coria path.
“Summon one of the swiftest of the coria and have it wait in readiness,” he added, as though by afterthought.
Through the lane down which the Dweller had passed we went as quickly as we could, coming at last to the space where the coria waited.
D. and Merrill, L.H. Pecan (H.coria pecan) "Food Analysis"
A dozen of the coria clustered, filled with Lugur's men and in one of them Lugur himself, laughing wickedly!
At the end of the coria road where the giant fernland met the edge of the cavern's ruby floor, hundreds of the Akka were stationed in ambush, armed with their spears tipped with the rotting death and their nail-studded, metal-headed clubs.
"Summon one of the swiftest of the coria and have it wait in readiness," he added, as though by afterthought.