Name the phylum that forms connecting link between Chordates and Non-chordates.

1. Hemiehordata was earlier considered as sub phylum of Chordata because the buccal diverticulum was considered as notochord. It is now placed as a separate phylum under Non-Chordata. 

2. It possesses certain characteristics of both Chordates and Non-chordates. 

3. Absence of notochord worm-like body, heart located on the dorsal side are the Non-chordate like characteristics seen in Hemiehordata.

4. Presence of nerve chord, pharyngeal gill slits are some of the Chordate-like characters seen in Hemiehordata. 

5. Hence, Hemiehordata is considered as a connecting link between Non-chordata and Chordata.