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Haliactis arctica. Transverse section of a perfect mesentery
in the reproductive tract.
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Edwardsia finmarchica. Transverse section of pennon in the
reproduction tract.
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Condylanthus aucklandicus. Transverse section of pennon
at the oral disk.
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Telmatactis australiensis. Transverse section of mesentery
of first cycle at level of lower part of actinopharynx.
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A transverse section of a retractor muscle in the upper part of
the fertile region of Edwardsia callianthus. (The mesogloea is shown
as black and the fertile and cnidoglandular areas are stippled.)
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