Noun
Cast skins, shells, or coverings of animals; any parts of animals which are shed or cast off, as the skins of snakes, the shells of lobsters, etc.
The fossil shells and other remains which animals have left in the strata of the earth.
Source: Webster's dictionaryNow the spider works its limbs free and typically winds up dangling by a new thread of silk attached to its own exuviae, which in turn hang from the original silk attachment. Source: Internet
They underwent ecdysis in a similar manner to extant chelicerates, and most fossils are thought to be of exuviae, rather than cadavers. Source: Internet
When ready to emerge, it splits its skin dorsally and climbs out of the exuviae as a winged adult and breaks out of the cell. Source: Internet