The latter are closely convoluted structures and imbedded in the liver. When compared with Schizoglossa novoseelandica it is found that the vas deferens in the latter species is free to a greater extent, that no portion of its internal prostatic course appears to be tubular, and there does not appear to be any vaginal papilla. During copulation the atrium is everted; the penis pore is thus brought forward and may be detected on the everted wall. In Paryphanta busbyi the anterior vaginal chamber doubtless undergoes complete eversion, and the vaginal papilla will be thrust outwards to a considerable degree—probably to a much greater extent than the appearance of the organ in its present condition suggests. Ecology These large snails live in litter, among plants on the ground and under logs in kauri forests and in shrubland. In some areas they have been reported to at times frequent underground habitats including burrowing deep into soft soil. They are also found in shrublands with non-native species like Hedychium and in forests with non-native plants including plantations of Pinus radiata. Paryphanta busbyi is often observed to be active when the weather is cool and wet. The activity is most strongly correlated with higher humidity and still air which may assist the snails to track their prey. The snails will then retreat into lairs during the day when lairs are available. In dry weather it is inactive. Paryphanta busbyi is carnivorous and predatory, feeding on earthworms, insects, insect larvae, snails of the genus Rhytida and on its own species (cannibalism). This snail sometimes lives in trees, very likely in clusters of semiparasitic plants, where it may find its natural food, earthworms. Life cycle The eggs are usually laid at the foot of large trees in clusters of four to six eggs, underneath dead leaves. The shape of the eggs is oval and seldom constant in dimensions and ranges from 10.5 × 9.5 mm or 12 × 9 mm to 14 × 10.75 mm. It has white limy egg without cuticle. 1953 studies indicate it takes 7 years to grow to the size where the width of the shell is 54 mm. A study from 2002 shows highly variable growth rates which are much higher than those recorded in 1953. The population density of Paryphanta busbyi is low in comparison of Powelliphanta. Predators These snails were not eaten by the Māori people. Predators of Paryphanta