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Summary

The morphology of Trypanosoma lewisi (Kent) from introduced rats in New Zealand is compared with that of the same flagellate from rats in England; and Hepatozoon musculi (Porter) is recorded from mice, Mus musculus Linnaeus, the locality record for the latter parasite being new. The post-mortem invasion of the blood of rabbits, Oryctolagus cuniculus (Linnaeus), by yeast-like vegetable cells of intestinal origin is discussed, and the possibility suggested that the organism concerned may be identical with that described by Sangiorgi as Hepatozoon cuniculi. Anaplasma-like bodies are recorded from cattle and from the Australian grey opossum, Trichosurus vulpecula (Kerr).