The present paper is a description of two species of acanthocephala obtained fromthe naked earp, Gymnocypris przewalskii (Kessler) of Qinghai Hu during the yearsof 1963-1964. The parasite dwells at the anterior part of the intestine of thehost. 1. Neoechinorhynchus qinghaiensis sp. nov. Body elongate, cylindrical. Proboscis short, globular in shape bears three rows ofhooks, ench row having six hooks. The apical hooks are lange and the others small. The male: Body length 1. 82-3.70 mm; width 0.33-0.60 mm. Proboscis length68. 6-114.3μ width 62.9-112.9μ. Testis ellipsoidal. situated in the posterior part ofthe body. The female: Body length 2.86-5.33 mm; width 0.49-0.69 mm. Proboscis leng-th 91.4-114.3μ; width 108.6-137.1μ. Eggs ellipsoidal, 22.0-29.5μ by 16.1μ insize. Location of the parasite: anterior part of the intestine. Discussion: This species differs from the closely related N. rutili (Muller 1780)chiefly in body size, length of proboscis hooks and shape of the eggs. 2. Echinorchus gymnocyprii sp. nov. Body elongate,cylindrical. Proboscis elongate,cylindrical, armed with 14-16longitudinal rows of hooks, each row having 10-11 hooks, unequal in length. The male: Body length 7.28-10.73 mm; width 0.77-1.53 mm. Proboscis length 777. 1-1068.5μ; width 154. 3-354.3μ. Testis situated in theposterior part of the body. The female: Body length 15.14-28.91 mm; width 1.16-1.90 mm. Proboscislength 697.1-1142. 8μ; width 371. 4-457. 1μ. Eggs elongate, fusiform. Location of the parasite: Anterior part of the intestine. Discussion: This species differs from the closely related E. salmonis Muller 1784chiefly in body and egg sizes.