The growth of larva and related complicated differentiation of coelom and the growth of sea urchin disc are followed. The development from five-day-old pluteus to metamorphosis of pluteus in four to five weeks is documented.
International Science Film Collection, Audio Visual Services, Pennsylvania State University, 201 Carnegie Building, 1127 Fox Hill Rd., University Park, PA 16802, Toll-free: 800-826-0132, URL: http://www.psu.edu
Running time 12 minutes.
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