Sugar phosphate polymers in polychaete tubes and in mineralized animal tissues

1. 1. The gross composition of the tube of Hyalinoecia tubicola , the source of onophuc acid, is examined. 2. 2. The tube of Chaetopterus variopedatus contains a phosphorus-rich polysaccharide, but other polychaete tubes and calcified tissues examined have not yielded similar substances. 3. 3. The Chaetopterus polymer is characterized and compared with onuphic acid.