The tissues of the bud become differentiated into ectoderm and endoderm, and the endoderm of the bud becomes secondarily continuous with that of the parent, but no part of the parental endoderm contributes to the building up of the daughter-polyp. Lang regarded this method of budding as universal in polyps, a notion disproved by O.
All the tissues external to the cork are cast off by the plant.
According to Hinds they feed chiefly on the green tissues, which " are punctured by the piercing mouth-parts and the sap withdrawn by suction.
The adult stage of this form is the Filaria loa found in the subcutaneous tissues of the limbs.
6 1 Iwanzov believes it to be contained within the thread itself before discharge, and to be introduced into the tissues of the prey by the eversion of the thread.