  We compute the two-point angular correlation function and number-magnitude
relation of Hubble Deep Field sources in order to assess their nature. We find
that the correlation peaks between 0.25 arcsec and 0.4 arcsec with amplitude of
2 or greater, and much more for the smallest objects. This angular scale
corresponds to physical scales of order 1 kpc for redshifts z > 1. The
correlation must therefore derive from objects with subgalaxian separations. At
faint magnitudes, the counts satisfy the relation Number prop. to 1/flux,
expected for images which are subdivisions of larger ones. A conservative
conjecture may explain these results. Since high redshift space (z > 0.5)
dominates the volume of the sample, observational redshift effects are
important. The K-correction and surface brightness dimming of diffuse sources
enhances the prominence of compact, unresolved, UV-bright objects, such as
star-forming regions within normal gas-rich galaxies. If such regions appear as
individual sources, they could explain the subgalaxian correlation.
