Aún no tenemos significados para "higher vertebrata".
1Skull and brain of Amphioxus shut up like an opera-hat in higher vertebrata.
2Fourteen segments or thereabouts in Amphioxus; all but one (barring possibilities about the ear capsule) aborted in higher vertebrata.
3Or to turn to the higher Vertebrata-inwhat sense are the Liassic Chelonia inferior to those which now exist?
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