(4) Catellum Regis (al-Mi'ilyah (after Pease);

(5) Arima (al-Araymah); probably early structures shown 
in black; (A) Donjon, (B) Main Gate of inner citadel, 
(C) outer gate (after Muller-Wiener.

The above are relatively small spur-castles.
  
Spur-Castle = a castle built on a rock spur
 or promontory usually along the side of a hill. 

Spur-castles obviously shared 
 certain features, princially having the strongest 
part of  their defenses facing the promontory
 that linked the spur to a neighboring hill.  
Several of these spur-castles had a deep fosse
 or ditch cut across the promontory.