CAUDA GALLI n.
A plume-shaped fossil, supposed to be a seaweed, characteristic of the lower Devonian rocks; as, the cauda galli grit. Gauda galli epoch (Geol.), an epoch at the begining of the Devonian age in eastern America, so named from the characteristic gritty sandstone marked with impressions of cauda galli. See the Diagram und…
CELLULAR a.
ptogams (Bot.), those flowerless plants which have no ducts or fiber in their tissue, as mosses, fungi, lichens, and algæ. -- Cellular theory, or Cell theory (Biol.), a theory, according to which the essential element of every tissue, either vegetable or animal, is a cell; the whole series of cells having been formed…