On the completeness of the lists of Compact Galaxy Groups

It is shown that the lists of Shakhbazian Compact Galaxy Groups (SCGGs) are not complete. The number of the detected groups in the strip between b = /-30 degrees and b = +/-20 degrees is by four to five times smaller than ex pected. The most probable reason is that during the search for SCGGs it was hard to distinguish images of compact galaxies from that of stars on the P OSS prints in dense areas of the sky at lower galactic latitudes. There is some deficit of the detected groups between 60 degrees and 40 degrees of th e north galactic latitudes. The surface density of SCGGs in the southern ga lactic hemisphere between b = -50 degrees and b = -30 degrees is by about t hree times less than it is expected. Obviously, the southern sky has not be en searched properly. The list of Hickson's groups is complete down to gala ctic latitude +/-30 degrees. However, some excess of HCGs is found in the s outhern hemisphere, where the surface density of the found groups is by abo ut two times higher than that of in the northern hemisphere.