a Bry is a perennial animal w/ potential 1. Differentiation - dedifferentiat. (can go both ways.) 2. Cuboid -> Flattened cell. 3. Bk in wall always results in epithelial cells closing breaks + filling 4. Division of cell by lateral division Intusception Is this a piling up or just accum. cells. - G. views this as same but Allan Cheetham views this as diff. process where cuticle is not involved. Septal division honey - double long. walls