A treatise on zoology . 76 THE CYSTIDEA canal (which may have contained a nerve of the aboral nerve-system).Interambulacrals numerous and irregular, all pierced by lies in a depression (cf. Edrioaster) ; surrounded by five interradial,slightly forked A, apparently continuous with the adambulacrals, andhomologous with the five plates similarly situated in Spliaeronis. Posterior

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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology