In common with the okapi, giraffes have skin-covered horns on the head, but in these animals, which form the genus Giraffa, these appendages are present in both sexes; and there is often an unpaired one in advance of the pair on the forehead.
From a linguistic point of view, these treatises with their appendages, the more mystic and recondite Aranyakas and the speculative Upanishads, have to be considered as forming the connecting link between the Vedic and the classical Sanskrit.
Besides the three types of individual above mentioned, there are other appendages of hydroid colonies, of which the individuality is doubtful.
A typical Siphonophore is a stock or cormus consisting of a number of appendages placed in organic connexion with one another by means of a coenosarc. The coenosarc does not differ in structure from that already described in colonial Hydrozoa.
The coenosarc may consist of a single elongated tube or stolon, forming the stem or axis of the cormus on which, usually, the appendages are arranged in groups termed cormidia; or it may take the form of a compact mass of ramifying, anastomosing tubes, in which case the cormus as a whole has a compact form and cormidia are not distinguishable.
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