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striking series of varieties than do those of any other classof Animals. As to number, they range from zero to countless quantities.The Lancelet, the Ammocete
above containingadipose tissue. In the Lancelet the substance of the noto-chord, fig. 23, ch, consists of a numberof circular discoidor flattened vesicles
above containingadipose tissue. In the Lancelet the substance of the noto-chord, fig. 23, ch, consists of a numberof circular discoidor flattened vesicles