Summary. A surgical, pathological and parasitologics curiosity in the shape of a case of hydatid disease of the liver showing lesions of the alveolar type is described, illustrated and discussed. This is the first case of its kind recorded in New Zealand and is comparable to the case unique in Australia reported by Professor H. R. Dew in this journal of September, 1931. Reference is made with bibliographic excerpts to the few cases of the alveolaris type that have arisen in countries other than its peculiarly selected endemic home, the Bavaro‐Tyrolean district. Some attention is given to the age‐long controversy “dualists versus unicists”, regarding the vexed question as to whether the alveolaris lesion is due to a specific Tænia alveolaris or to a mere modification or mutation of the ordinary Tænia echinococcus
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MEADE et al. (1941) studied this question.