Distribution:- Peripatus has discontinuous distribution. The genus peripatus is found restricted in the various places of the world such as South Africa, Australia, New Zealand, Tasmania, New Britain, South America and the West Indies, Malaya, Equatorial Africa and chile.
Habit and Habitat:- Peripatus is nocturnal, lives in crevices of rocks, under bark and stones and in other dark moist places and beneath fallen leaves. It is generally confined to humid habitats.
1) Body of the peripatus is elongated, cylindrical Caterpillar – like without external segmentation,measuring 1.5 to 15.00 cm in length.
2) Head is not distinct.
3) Mouth is ventral on the anterior side.
4) Respiration by paired nephridia.
5) Sexes are separate and gonads are paired.
6) Carnivorous. It feeds on insects.
Peripatus is of special interest because its body exhibits certain structures.
Distribution:- Lepisma is commonly known as Silver Fish.
Habit and Habitat:- Lepisma is commonly found in damp, cool places and in books.
1) Lepisma is commonly known as silver fish.
2) Body is flattened and covered with silvery scales.
3) Head bears a pair of many segmented antennae and a pair of ocelli.
4) Mouth parts biting and chewing type.
5) Thorax bears three pairs of legs but is devoid of wings.
6) Abdomen elven segmented with a pair of long jointed cerci and median caudal filament.
7) Development directly without metamorphosis.
Silverfish are generally considered nuisance pests. They have no effect on human health. They usually do relatively little damage, but will feed on paper, book bindings, wallpaper, rayon drapes, starched cotton, lines and silk.