Any of different primitive chordate creatures associated with the subphylum Cephalochordata, like the lancet, that lack a real vertebral line.
the primitive fishlike animals, of this subphylum Cephalochordata, such as the lancets, that lack a genuine spine but have actually a notochord which, when it comes to cephalochordates, achieves in to the head, contrary to the Urochordata
fish-like pets having a notochord without a real spinal column
any one of different ancient chordate pets regarding the subphylum Cephalochordata, including the lancet, that are lacking a true vertebral column.
some of the primitive fishlike creatures, for the subphylum Cephalochordata, including the lancets, that lack a genuine spine but have a notochord which, in the case of cephalochordates, hits into the mind, contrary to the Urochordata
fish-like animals having a notochord in place of a true spinal column