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Figure 4.3. Age Range Chart produced from Neptune for the occurrences of Globorotalia truncatulinoides and Globorotalia tosaensis. The plot shown here represents only a subset of the data obtained from Neptune for this search. The symbols are explained in the caption at the bottom of the figure. The charts are produced in colour, with the colour of the bullets corresponding to the species name on the right. Small black dots represent samples that were examined but where none of the selected species was found. This figure is an unmodified reproduction of the format produced by the Age Range Chart program (Lazarus, 1994). The large number of data in the figure and its format make difficult to understand it when it is reduced to a one-page size and does not clearly show the differences between the different speciesí occurrences.