宋代的沈括在《梦溪笔谈》中记日:“海物有车渠蛤属也,大者如箕。背有渠垄如蚶壳,故以为器致如白玉,生南海。”砗磲——分布于印度洋和西太平洋的一类大型海贝,我国台湾、海南、西沙群岛及其他南海岛屿也有分布。它们大都生活在热带海域的珊瑚礁环境中。在现已发现的海洋贝类中,砗磲是体形最大的,直径可达1.8米。砗磲一名始于汉代,因外壳表面有一道道呈放射状之沟槽,其状如古代车辙,故称车渠。后人因其坚硬如石,在车渠旁加石字。汉代伏胜所著《尚书大传》中,有 Shen Kuo in the Song Dynasty in the “Meng Xi Bi Tan” in mind: “Sea animals have a car clams also, the largest such as Kei .Ditch back canal ridge, such as shell, so that the device is caused by white jade, the South China Sea.”磲 - A type of large seashells distributed in the Indian Ocean and the Western Pacific Ocean, also distributed in Taiwan, Hainan, Xisha Islands and other South China Sea islands in China. Most live in coral reefs in the tropics. Among the marine shellfish that have been found in the world, clams are the largest in size and up to 1.8 meters in diameter.砗 磲 A ​​person began in the Han Dynasty, because the shell surface has a radial radial groove, its shape like the ancient rut, it said the car canal. Descendants because of its hard as stone, beside the car canal plus stone. Fusheng in the Han Dynasty, “Book Biography”, there