Why is peripatus said to be connecting link between Annelida and Arthropoda?

Connecting link:

Organisms that possess characteristics of two different species, organisms, or phyla are referred to as connecting links.

Peripatus:

1. It is also called as velvet worms and resemble caterpillars.
2. These are primitive arthropods.
3. These have joint pairs of legs and trachea-like arthropods.
4. They also possess a worm-like segmented body, non-chitinous cuticle, and segmental nephridia.
5. Hence, it is referred to as the connecting link between annelids and arthropods.