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We present the fitted profiles for the host galaxies of over 40 BL Lac objects of known redshift (z $\sim$ 0.05--0.64). These objects make up the complete sample of X-ray selected BL Lac objects (Morris et al. 1991) from the the Einstein Medium Sensitivity Survey, and a subset of the complete sample of radio-selected BL Lacs from the 1 Jansky survey (Stickel, et al. 1991).
We find that generally these hosts are consistent with the host galaxies of Fanaroff-Riley Type I radio galaxies as well as Brightest Cluster Galaxies, but that a few host galaxies are clearly unusual and may be signs of a dissimilar sub-population of ``interesting objects''.
We also present galaxy clustering parameters for the fields around BL Lac objects. Preliminary indications are that, taken as a whole, these objects appear in regions of galaxy excess and thus their environments are similar to those of Fanaroff-Riley Type I radio galaxies.
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