Urochordata:
1. Urochordates have notochord in the tail region of the adult body.
2. These animals look like small sacs.
3. Usually urochordates are hermaphrodites.
4. Body of urochordate is covered over by skinlike test or tunic.
5. Examples: Herdmania, Doliolum, Oikopleura, etc.
Cephalochordata:
1. Cephalochrodates have notochord in the entire length of the body.
2. These animals look like small fish.
3. Cephalochordates are unisexual.
4. Body of cephalochordate is not covered in a test.
5. Example: Amphioxus.
