TY - JOUR T1 - Ascidians of the Bermudas JF - Biological Bulletin Y1 - 1932 A1 - Berrill, N.J. SP - 77 EP - 88 VL - 62 ER - TY - JOUR T1 - The structure of the ascidian, Pycnoclavella stanleyi n. sp., and the nature of its tadpole larva. JF - Canadian Journal of Research Y1 - 1949 A1 - Berrill, N.J. A1 - Abbott, D.P. SP - 43 EP - 49 VL - 27 ER -