Compositions and evolutionary stages of our SERIES I models when calculations were terminated, in raster format. Metallicity for the bottom, middle, and top panel is Z = 10⁻⁴, Z = 10⁻³, and Z = 0.02 respectively, while the colorbar indicates the composition of the core at the endpoint of the simulation (see text). Semihatched regions show models that stopped only after developing a near-M_Ch core within the range 1.35−1.37 M_⊙, shortly before oxygen ignition. All these models also have no envelopes and contain no helium. Fully hatched regions show models with near-M_Ch cores that reached the explosive oxygen burning stage. All nonhatched ONe models stopped before their entire envelope was lost, and have cores with masses between (1.0 < M_c/M_⊙ ≤ 1.36).