  An abundance analysis for the carbon-enhanced, extremely iron-poor ([Fe/H]
-3.5) star CS29498-043 has been obtained using new high-resolution, high
signal-to-noise spectra from the Subaru Telescope. The [O I] forbidden line at
6300A and the O I triplet feature at 7771-7776A are both clearly detected. The
overabundance of oxygen is significant ([O/Fe]>2). In addition, Na, Co, and Ni
abundances have been newly measured. The abundance pattern from C to Ni of this
object is quite similar to that of CS 22949--037, another extremely metal-poor
star with large excesses of C, N, O, and the alpha-elements. The abundance
patterns of these two stars suggest the existence of supernovae progenitors
that ejected relatively little material fromtheir iron cores during the very
early era of nucleosynthesis in the Galaxy. Themetallicity in these objects,
when one includes the elements C, N, and O in the tally of total metals, is not
as low as in the most metal-poor stars, suggesting the existence of quite
different formation processes for these iron-deficient objects than pertain to
the bulk of other metal-deficient stars.
