much cooler than could be detected with IRAS. In this context we also mention the proposition by Blitz (1999) that the HVCs make up the missing mass by being essentially dark halos with low velocity dispersions.

We report here results from a study of a diffuse ring-like FIR feature at high galactic latitude, which we interpret as “local”, not extragalactic, despite first indications to the contrary. The region toward which this feature is located is the center of the Virgo cluster of galaxies. This part of the sky has been studied in exquisite detail, yet new studies always detect interesting features. For example, Katsiyannis (1998) produced a very deep image of the central regions of the cluster from a combination of 13 deep Kodak TechPan films obtained with the UK Schmidt telescope. The image shows large variations in the brightness of the intra-cluster medium, with the brightest regions north of the cluster center. M87 is fairly central in the region of enhanced brightness, close to the upper left corner of the “very high contrast image” in their Fig. 6. Previous deep imaging of the central VC region (Weil 1997) revealed a diffuse extension of (presumably stellar) material extending $\sim$100 kpc 