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Petrushevskaya 1967

Fig. 51
I - Antarctissa longa (Popofsky), almost completed skeleton (station 16); II - Helotholus histricosa J├Ârgensen from sediments of North Atlantic (station C 2104). Antarctissa strelkovi sp. n.: III - completed specimen (station 16); IV - station 180; V - specimen with completed "thorax" viewed from below; VI - early stage of growth of skeleton with only elements of internal skeleton and "cephalis" formed.