Castes and Tribes of Southern India/Sanku
Sanku.— Sanku, the conch or chank (Turbinella rapa) has been recorded as a sub-division of Dāsaris, Koppala Velamas, and Paraiyans who act as conch-blowers at funerals, and as an exogamons sept of Kuruba. Sankukatti, or those who tie the chank, occurs as a sub-division of Idaiyan. The chank shell, which is regularly collected by divers off Tuticorin in the Tinnevelly district, is highly prized by Hindus, and used for offering libations, and as a musical instrument at temple services, marriages, and other ceremonials. Vaishnavites and Mādhvas are branded with the emblems of the chank and chakram. The rare right-handed chank shell is specially valued, and purchased for large sums. A legend, recorded by Baldæus, runs to the effect that "Garroude (Garuda) flew in all haste to Brahma, and brought to Kistna the chianko or kinkhorn twisted to the right". Such a shell appears on the coat-of-arms of the Rāja of Cochin and on the coins of Travancore.