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Show Hind Llm s Lacking r Animals. Snakes are not the only animals which exhibit the possession of null-mentally null-mentally hind limbs. In the whale trlbo there Is no evidence externally-of externally-of hind limbs. Tho foro limbs In them aro .converted into tho "flippers," "flip-pers," or swimming pa'Mles. Yet, when tho skelton Is examined, traces of a haunch and attacV rudimentary rudimen-tary thigh bones aro fc' "A. Them Is developed In certain kinds of whales a bony piece representing the haunch; td thigh bono is distinct, but there is mere rudln-;iit attached to It, ropre' ntlng tho shin bono or tibia of other animals. |