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Biol Bull 67: 182-200. (August 1934)
© 1934 Marine Biological Laboratory
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THE LIFE HISTORY OF THE COPEPOD TORTANUS DISCAUDATUS (THOMPSON AND SCOTT)

MARTIN W. JOHNSON 1

1 From the University of Washington Oceanographic Laboratories, Seattle, Washington

1. Identification of the pelagic eggs of Tortanus discaudatus is established by hatching larvæ from eggs occurring in the plankton and also from eggs definitely known to have been spawned by the species in experimental cultures.

2. A description is given of the development of the specialized flotation case containing the egg.

3. The nauplius stages I-VI are described and figured.

4. The copepodid stages I-V are described and figures given.

5. The nauplius larva has a remote resemblance to the nauplius larvæ of Acartia longiremis and Acartia bifilosa.






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Copyright © 1934 by the Marine Biological Laboratory.