CARNIVORA 67 the conditions of his existence and the work he has to do. CARNIVORA.—The order of carnivores is another old group which must not have its name taken too literally. It does not include all the flesh- eaters ; and some of its members, notably among the bears, are practically vegetarians. Speaking gene- rally, however, the name is appropriate, for most of the species prey on other animals and live on warm flesh. In structure there is a great resemblance among them all. Their lower jaw can only move vertically, owing to the projecting process or condyle being semi-cylindrical, and working in a deep narrow, glenoid ‘ fossa’—or hollow—of corresponding form. Like the potamogale, but unlike the rest of the insectivores, their collar-bones are either absent or represented by little splints embedded in the muscles. Unlike, too, the majority of the insecti- vores, the bones of the forearm are distinct, and the fibula in the lower leg slender, though it is always separated from the tibia. The wrist-bones, too, are peculiar in having the lunar and scaphoid all in one, and no central bone; and with regard to this, it may be as well to explain that in the typical wrist there are eight bones—(1) the scaphoid, so called from its boat-shaped socket ; (2) the lunar, so called from its crescent shape, both of these being in con- nection with the radius ; (3) the cuneiform, or wedge- shaped bone, connected by a ligament with the ulna; and (4) the pisiform, or pea-shaped bone, developed in the tendon and gliding over in front of the cunei- E2