3220. Echinodermata. 10 Color Photomicrographs. 1. Asterias, starfish, small specimen w.m. 2. Asterias, t.s. of arm 3. Asterias, bipinnaria larva 4. Asterias, pedicellaria 5. Asterias, horizontal section young specimen 6. Asterias, regeneration 7. Psammec