A revision of the morphology ofNectocaris pteryxConway Morris, 1976, and a comparison with the morphology of living Chor‐dates supports the inclusion ofNectocarisin the phylum Chordata. The supposed somewhat crustacean‐like valves, which sheath the forepart of the animal are probably better considered as being the dermo‐epidermal folds that limit the peribranchial cavity of most lower Chordates, while the tail closely resembles the tail of the larval Tunicata and ofBranchiostoma.The large eyes are a unique feature. A new subphylum within the Chordata is needed forNectocaris.