Ampulla Morphogenesis in Anural and Urodele Molgulid Ascidians: (ascidians/ampulla morphogenesis/contraction rings)

William R Bates1

  • 1Department of Biology, Carleton University, Ottawa, Ont., Canada K1S 5B6, Marine Biological Laboratory, Woods Hole, MA, USA 02543 and Bamfield Marine Station, Bamfield, B. C., Canada VOR 1BO.

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