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Updated: May 15, 2025
An exception to this rule is presented by the Hyperinae which usually live upon Acalephae. In these the young and adults often have a remarkably different appearance; but even in these there is no new formation of body-segments and limbs, but only a gradual transformation of these parts.*
This day the ship went so fast that we could not catch anything. The acalephae were not so numerous as they had been further to the north, but we saw more and larger medusae than I had ever before remarked. It indeed appeared as if the acalephae diminished and the medusae increased in number after passing the 36th degree of south latitude.
That a great part of the larger and smaller groups into which this class is divided, might be regarded as satisfactorily established, was a further advantage not to be undervalued; whilst in two other classes with which I was familiar, namely, the Annelida and Acalephae, all the attempted arrangements could only be considered preliminary revisions.
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