Sorry S'land, not the CANT Z1018, but....
EvansB has it...its the North American XB-21. It was a contender for the contract eventually awarded to Douglas for the B-18 (so you were very close RampTramp!). The XB-21 was reported to be twice the cost of the B-18, so, not surprisingly, the B-18 was chosen. I don't know if its just me, but does that fuselage remind you of the Lockheed PV-2 Harpoon?
EvansB has control.