  We present preliminary results from a survey of CO emission from members of a
volume-limited sample of non-cluster elliptical galaxies. Our intent is to
compare the gas properties of these ellipticals to a sample of lenticulars
selected using similar criteria. The data, although still sparse, suggest that
the cool gas in ellipticals shows the same puzzling upper mass cutoff found in
the lenticular galaxies. We find, however, significantly lower detection rates
and possibly much lower H2/HI mass ratios in the ellipticals. The detection
rate is higher among the lower-mass galaxies, as has been found previously.
This seems puzzling given that the deeper potential wells of the larger
galaxies ought to make gas retention easier, but perhaps that effect is
overwhelmed by feedback from the central suppermassive black hole. As we have
observed ~40 percent of our sample, the conclusions are necessarily tentative
at this time.
