▁like ▁a ▁golf ▁club . ▁The ▁is ch ium ▁has ▁three ▁qu arters ▁the ▁length ▁of ▁the ▁pub is , ▁set ▁at ▁an ▁angle ▁of ▁ 5 4 ° ▁to ▁it . ▁It ▁ends ▁in ▁a ▁small ▁expansion . ▁On ▁the ▁front ▁of ▁its ▁sh aft ▁a ▁large ▁h atch et - sh aped ▁obt ur ator ▁process ▁is ▁present , ▁the ▁attachment ▁for ▁the ▁Mus cul us ▁pub o isch io f emor alis ▁extern us , ▁that ▁la cks ▁a ▁small ▁circular ▁not ch ▁between ▁its ▁lower ▁edge ▁and ▁the ▁sh aft , ▁though ▁this ▁lack ▁is ▁normally ▁associated ▁with ▁the ▁possession ▁of ▁a ▁lower ▁tri angular ▁process us ▁obt ur ator ius . ▁ ▁Of ▁the ▁h ind lim b , ▁the ▁lower ▁leg ▁is ▁missing . ▁The ▁fem ur ▁or ▁th igh ▁b one ▁is ▁straight ▁and ▁robust . ▁The ▁less er ▁tro chan ter ▁is ▁marked ly ▁lower ▁than ▁the ▁greater ▁tro chan ter ▁and ▁separated ▁from ▁it ▁by ▁a ▁narrow ▁c left . ▁It ▁has ▁the ▁shape ▁of ▁a ▁wing - like ▁expansion ▁to ▁the ▁front . ▁An ▁access ory ▁or ▁posterior ▁tro chan ter ▁is ▁lack ing ; ▁like wise ▁a ▁fourth ▁tro chan ter ▁on ▁the ▁back ▁sh aft ▁is ▁absent . ▁The ▁tib ia ▁has ▁only ▁a ▁weak ▁c nem ial ▁cr est , ▁separated ▁from ▁its ▁outer ▁cond yle ▁by ▁a ▁deep ▁narrow ▁gro ove , ▁the ▁in cis ura ▁tib ial is . ▁The ▁fib ula ▁is ▁broad ▁on ▁top ▁but ▁has