Looks like a CL-289
Yup. Drone rocket. Canadair CL-289. High speed penetrator. French army have around 50 of these. Last used in Africa.
Two 1,150 litres (300 USgal) CFTs were first tested by Dassault in April 2001.[3]http://en.wikipedia.org/wiki/Conformal_fuel_tank
Does it merge with the main dorsal spine? The first picture seems to indicate other wise.