Classification of Superclass Agnatha | Zoology

In this article we will discuss about the classification of superclass agnatha. 1. Eel-like animals with circular mouth, slimy, scale less skin and without jaw and unpaired fins with slender cartilaginous fin rays. 2. The brain is encased in a cartilaginous cranium. 3. Pouched gills supported by cartilagi­nous branchial basket. 4. Notochord, the chief axial support for the body, persists [...]