Hydrocarbons

Compounds consisting of carbon and hy IMG:content-0703.jpg:[ocr errors] drogen, e.g. , H.C.C.CH,; solid, liquid, or gaseous, according as they contain many or few carbon atoms in the single molecule. Hydro caul us (HYDROPHYTON). Part of a hydroid colony intervening between a hydranth and the hydrorhiza. Varieties of Water Bugs. four joints, sometimes hidden from view, and a short rostrum. They feed on animal juices.