<prompt> Crural index isLength of tibiafemur x 100Length of radiushumerus x 100Length of fibulatibia x 100Length of radiusulna x 100  <response>: Ans. is a i.e., Length of tibiafemur x 100 Race determination of skeletonA Cephalic Index Cl Cephalic index is defined as the index of breadth of skullCephalic index Max. breadth of skull---Max. AP length of skullx 100 Based of cephalic index races are clasified into following three1 Dolichocephalic longheaded: Cephalic index is 70-75 and is a feature of Caucasions, PureAryan Indians, Aborigines, and Negroes.2 Mesaticephalic medium headed: Cephalic index is 75-80 and is a feature of Europeans, and Chinese.3 Brachycephalic short headed: Cephalic index is more than 80 and is a feature of MongolianB Brachial Index Brachial index is defined asBrachial index Lenght of radius---Lenght of humerusx 100 Brachial index is 74.5 in Europeans and 78.5 in Negroes.C Crural index It is defined asCrural index Lenght of tibia---Lenght of femurx 100 Crural index is 83.3 in Europeans and 86.2 in Negroes.D Humero-femoral index HF index It is defined asHumero-femoral index Lenght of humerus---Lenght of femurx 100 It is 69 in Europeans and 72.4 in Negroes.E Intermembral index It isIntermembral index Lenght of radius humerus---Lenght of tibia femurx 100 It is almost same 70 in Europeans and Negroes.F Orbit It is square in Pure Aryans Indians, Negroes, and Arborigines. It is triangular in Chinese and Europeans. It is rounded in Mongols.G Nasal opening It is broad in Pure Aryans Indians, Negroes, and Arborigines. It is narrow and elongated in Chinese and Europeans. It is rounded in Mongols.H Palate Palate is rectangular in Pure Aryans Indians, Negroes, and Arborigines. It is triangular in Chinese and Europeans. It is rounded or horse shoe shaped in Mongols. 