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Tuatara: Volume 16, Issue 1, April 1968
Fig. 1: Numbers of Indo-Pacific molluscan genera in New Zealand Tertiary stages. Black histogram shows numbers recorded from South Island localities; cross-hatched histogram shows numbers recorded in the North Island only; uppermost (unshaded) histogram shows numbers present in each stage, assuming each genus was present from its first until its last recorded occurrence
Fig. 1: Numbers of Indo-Pacific molluscan genera in New Zealand Tertiary stages. Black histogram shows numbers recorded from South Island localities; cross-hatched histogram shows numbers recorded in the North Island only; uppermost (unshaded) histogram shows numbers present in each stage, assuming each genus was present from its first until its last recorded occurrence.