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Show Hind Limbs Lacking in Animals. Sna! s aro not the only nnlmals which exhibit tho possession of null-mentalh null-mentalh hind limbs. In the whalo tribe t ie-" Is no evidence externally of hln 1 limbs The fore limbs In them a'o converted Into the "flippers." "flip-pers." or swimming paddles. Yet, who the Bkelton Is examined, traces of a haunch nnd at'nched 111 flmen-tar flmen-tar thigh bones nre found Thpf Is developed In certain kinds of whnles a bony piece tepresentlng the haunch, tho thigh bone Is distinct, hut tlu 1 e .. a mere rndlinert attached to It, icpr. -anting the shin bone or tibia of other nnlmals |