▁pro vent ric ulus ▁preceding ▁a ▁mus cular ▁g izz ard . ▁Gast rol ith s ▁have ▁not ▁been ▁reported . ▁ ▁Just ▁behind ▁the ▁pres umed ▁position ▁of ▁the ▁st om ach ▁a ▁very ▁consp ic uous ▁large ▁and ▁thick ▁int est ine ▁is ▁visible , ▁that ▁has ▁been ▁identified ▁as ▁the ▁du oden um . ▁It ▁is ▁preserved ▁partly ▁in ▁the ▁form ▁of ▁a ▁natural ▁end oc ast , ▁partly ▁as ▁a ▁pet r ification ▁still ▁showing ▁the ▁cell ular ▁structure , ▁including ▁the ▁m uc osa ▁and ▁connect ive ▁t issue . ▁Some ▁m esent er ic ▁blood ▁vessels ▁cover ▁the ▁int est ine ▁in ▁the ▁form ▁of ▁up ▁to ▁a ▁cent imet re ▁long ▁and ▁ 0 . 0 2 ▁to ▁ 0 . 1 ▁mill imet re ▁wide ▁h ollow ▁tub es . ▁The ▁du oden um ▁forms ▁a ▁large ▁loop , ▁the ▁desc ending ▁part ▁of ▁which ▁first ▁is ▁directed ▁down wards ▁towards ▁the ▁g astr alia ▁and ▁then ▁runs ▁to ▁the ▁back . ▁There ▁in ▁a ▁sharp ▁b end , ▁the ▁fol ds ▁of ▁which ▁are ▁clearly ▁visible , ▁it ▁turns ▁to ▁the ▁front , ▁proceed ing ▁as ▁an ▁asc ending ▁tract , ▁its ▁visible ▁part ▁ending ▁near ▁the ▁st om ach . ▁At ▁this ▁point ▁the ▁tract ▁is ▁directed ▁to ▁the ▁left ▁of ▁the ▁body , ▁per pend icular ▁to ▁the ▁foss il ▁sl ab , ▁and ▁its ▁course ▁can ▁thus ▁no ▁longer ▁be ▁followed . ▁Near by ▁and ▁slightly ▁above , ▁a ▁subsequent ▁int