A sample of 14708 extragalactic IRAS sources selected from the Point S
ource Catalog via statistical classification has been cross-correlated
with the ROSAT All Sky Survey (Boller et al., 1992). 244 galaxies eme
rge as being detected both by ROSAT and IRAS. The most interesting poi
nt is the discovery of a dozen of ''normal'' spirals whose X-ray lumin
osities reach nearly 10(43) erg s-1(0.1-2.4 keV), higher than previous
detection limits of a few 10(41) erg s-1 (Stocke et al. 1991; Green,
Anderson and Ward, 1992). We obtained optical spectra for nine of them
, showing Seyfert spectra for three of the objects (thus previous mis-
classifications), spectra close to LINERs for two further objects and
normal IRAS galaxy spectra for the last four. In the case of ''normal'
' galaxies, the source of energy is not clear yet and could be related
to the high rate of star formation likely to occur in the central reg
ions or also to a low level active nucleus. The study of these objects
is of interest to the nature of LINERs and, more generally, to possib
le relations between AGN and starbursts (Sanders et al., 1988).