Abstract: The article deals with an investigation on gross dissection of arterial system among Rhinopithecus roxellanae, R, bieti and R. brelichi. The results examined for the three species ( 6 specimens ) and the differences among them are as follows.1. Two branches arc given off from the arch of the aorta, viz. the common trunk and the left subclavian. the branches of Snub-nosed Monkeys belong to C type mentioned by Glidden and De Garis(1936).2. The external carotid bifurcate into anterior and posterior trunks. The bifurcation consist with basal branched type of the external carotids in primates, except Gibbon and man.3. In Rhinopithecus the two anterior cerebral arteries build Willis'circle unite to become an anterior cerebral common artery, resembling to those of New and Old World monkeys, but not like to those of apes and man.4. None of the costocervical and thyrocervical trunks take rise to subclavian artery in Rhinopithecus, suprema intercostal artery and inferior thyroid artery are also absent.5. The axillary artery and the branchial artery of Rhinopithecus give off 3-4 trunks separatively. The latter arises from the radial artery and the ulnar artery at a level of the elbow. In this case, it is resembling those of Presbytis,all apes and man.6. Arcus palmaris superficialis and profoundus, like anthropoid apes, are seen to occur in hands of Rhinopithecus, but there is only an arcus palmaris superf icialis in common monkeys.7. All of the intercostal arteries are arisen from the thoracic aorta.8. The inferior epigastric artery and the medial femoral circumflex artery of bieti and roxellanae are given off from the internal iliac artery,while those of brelichi arise from the external iliac artery.9. The external femoral circumflex and two perforating arteries originate from the profundus femoral artery in Rhinopithecus.10. In both roxellanae and brelichi the saphenous artery is continued f.s an dor- salis profundus pedal artery, while in bieti it is the continuation of the anterior tibial artery, as seen in man.11. The pedes of bieti possess both arcus plantaris superficialis and profundus, but those of roxellanae and brelichi only one arcus plantaris profundus.