A total of four species collected in the Chinese waters from 1959-1978 and belonging to two genera and three subgenera are identified and described. Of these, Pecten ( Notovola) albicans (Schr?ter) is rather a large and important species with 10 broad radial ribs. It is abundantly and widly distributed in the Yellow Sea and the East China Sea. Pecten (Minnivola) pyxidatus (Born) is medium in size and found to occur in the East China Sea and South China Sea. The shell of the latter is provided with 28 fine radial ribs. Its surface is purplish brown with white or light yellowish brown patches on the left valve. Pecten ( Oppenheimopecten) excavatus Anton is a rare large species with 16 broad radid ribs in the deeper waters off the Guangdohg coast. Serratovola tricarinatus (Anton) is a rather small species with 18 rather fine radial ribs found abundantly at the depths of 50--120 m in the South China Sea.