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The recent discovery in the Tasmanian “schizopod” Anaspides, of what is believed to be a living representative of the Carboniferous and Permian Syncarida, has, however, afforded a clue to the affinities of some of these problematical forms.

One of these, the schizopod crustacean Mysis relicta,—a shrimp-like creature,—which was formerly believed to inhabit also the Caspian, is of particular interest.

The youngest larva of the Schizopod genus Euphausia observed by Claus, stands very near the youngest Zoea of our Prawns; but whilst its anterior antennae are already biramose, and it therefore appears to be more advanced, it still wants the middle maxillipedes.