NEW VERY LARGE ARRAY MAPS OF HIGHLY CORE-DOMINATED BL-LACS - TESTING UNIFIED SCHEMES

We present high dynamic range (> 10 000: 1) VLA maps of four highly co re-dominated BL Lacertae Objects (PKS 0735+178, OJ 287, 1219+285, and PKS 1413+135), all of which had been reported previously as being unre solved at dynamic ranges approximately 1000-3000:1. Three of the four possess low surface brightness kpc-scale structure, with extended powe r levels and morphologies reasonable for FR 1 radio galaxies. One, how ever (PKS 1413+135), possesses no extended structure at dynamic range 9600:1. Only one of the sources exhibits aligned VLA and VLBI structur es, suggesting bends on approximately 100-1000 pc size scales for the other two. As these four have extremely high core-to-extended flux rat ios (f approximately 30-5000), they provide an extreme test of unified schemes. By deriving minimum constraints for the beaming angles and L orentz factors which are required to produce the degrees of core domin ance seen, we find that the three extended radio sources are consisten t with being beamed FR 1 radio galaxies. PKS 1413+135 remains an anoma lous BL Lac Object for several reasons.