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The Kāpālika tradition was a non-Puranic, tantric form of Shaivism in India, whose members wrote the Bhairava Tantras, including the subdivision called the Kaula Tantras. These groups are generally known as Kāpālikas, the "skull-men," so called because, like the Lākula Pāsupata, they carried a skull-topped staff (khatvanga) and cranium begging bowl. Unlike the respectable Hindu householder of the Shaiva Siddhanta, the Kāpālika ascetic imitated his ferocious deity, and covered himself in the ashes from the cremation ground, and propitated his gods with the impure substances of blood, meat, alcohol, and sexual fluids from intercourse. The Kāpālikas thus flaunted impurity rules and went against Vedic injunctions. The aim was power through evoking deities, especially goddesses.
In modern Tamil Nadu, certain Shaivite cults associated with the goddess Angala Parameshwari, Irulappasami, and Sudalai Madan, are known to practice or have practiced ritual cannibalism, and to center their secretive rituals around an object known as a kapparai (Tamil "skull-bowl," derived from the Sanskrit kapala), a votive device garlanded with flowers and sometimes adorned with faces, which is understood to represent the begging-bowl of Shiva (Meyer 1986).
One of the earliest references to a Kāpālika is found in Hāla's Prakrit poem, the Gāthāsaptaśati (third to fifth century A.D.) in a verse in which the poet describes a young female Kāpālikā who besmears herself with ashes from the funeral pyre of her lover. Varāhamihira (c500-575) refer more than once to the Kāpālikas thus clearly establishing their existence in the sixth century. Indeed, from this time onwards references to Kāpālika ascetics become fairly commonplace in Sanskrit ...
Dyczkowski (1988: p. 26) relates how Kṛṣṇa Miśra casts the character of a kapalika in his play, the Prabodhacandrodaya and quotes verbatim a source that renders the creed of this character into English thus:
"My charming ornaments are made from garlands of human skulls." says the Kāpālika, "I dwell in the cremation ground and eat my food from a human skull. I view the world alternately as separate from God (Īśvara) and one with Him, through the eyes that are made clear with the ointment of yoga... We (Kāpālikas) offer oblations of human flesh mixed with brains, entrails and marrow. We break our fast by drinking liquor (surā) from the skull of a Brahmin. At that time the god Mahābhairava should be worshipped with offerings of awe-inspiring human sacrifices from whose severed throats blood flows in currents.
Kapalika and Buddhism
Beer (2003: p. 102) relates how the symbolism of the khatvanga that entered esoteric Buddhism was a direct borrowing from the Shaivite kapalikas who frequented places of austerity such as charnel grounds as a form of left-hand path (Sanskrit: vamamarga) spiritual practice (Sanskrit: sadhana):
The form of the Buddhist khatvanga derived from the emblematic staff of the early Indian Shaivite yogins, known as kapalikas or 'skull-bearers'. The kapalikas were originally miscreants who had been sentenced to a twelve-year term of penance for the crime of inadvertently killing a Brahmin. The penitent was prescribed to dwell in a forest hut, at a desolate crossroads, in a charnel ground, or under a tree; to live by begging; to practice austerities; and to wear a loin-cloth of hemp, dog, or donkey-skin. They also had to carry the emblems of a human skull as an alms-bowl, and the skull of the Brahmin they had slain mounted upon a wooden staff as a banner. These Hindu kapalika ascetics soon evolved into an extreme outcast sect of the 'left-hand' tantric path (Skt. vamamarg) of shakti or goddess worship. The early Buddhist tantric yogins and yoginis adopted the same goddess or dakini attributes of the kapalikas. These attributes consisted of; bone ornaments, an animal skin loincloth, marks of human ash, a skull-cup, damaru, flaying knife, thighbone trumpet, and the skull-topped tantric staff or khatvanga.
Ronald M. Davidson, citing various evidences, disagrees with Alexis Sanderson's assertion that the Kāpālikas had a one way influence on the Buddhist yoginī-tantras (also known as Mother Tantras). Davidson concludes:
This and other evidence suggests that the Buddhist-Kāpālika connection is more complex than a simple process of religious imitation and textual appropriation. There can be no question that the Buddhist tantras were heavily influenced by Kāpālika and other Saiva movements, but the influence was apparently mutual. Perhaps a more nuanced model would be that the various lines of transmission were locally flourishing and that in some areas they interacted, while in others they maintained hostility. Thus the influence was both sustained and reciprocal, even in those places where Buddhist and Kāpālika siddhas were in extreme antagonism.
- Flood, Gavin. 2003. The Blackwell Companion to Hinduism. Malden: Blackwell. pg. 212
- Flood, Gavin. D. 1996. An Introduction to Hinduism. P.164-167
- Dyczkowski, Mark S. G. (1988). The canon of the Śaivāgama and The Kubjikā Tantras of the western Kaula tradition. SUNY series in Kashmir Śaivism. SUNY Press. ISBN 0-88706-494-9, ISBN 978-0-88706-494-4 Source:  (accessed: Thursday February 4, 2010)
- Dyczkowski, Mark S. G. (1988). The canon of the Śaivāgama and the Kubjikā Tantras of the western Kaula tradition. SUNY series in Kashmir Śaivism. SUNY Press. ISBN 0-88706-494-9, ISBN 978-0-88706-494-4 Source:  (accessed: Thursday February 4, 2010)
- Mallinson, James. "Siddhi and Mahāsiddhi in Early Haṭhayoga." In: Yoga Powers,edited by Jacobsen, Knut A. Leiden: Brill, 2012. pp. 327-344.
- Sanderson, Alexis. "The Śaiva Age: The Rise and Dominance of Śaivism during the Early Medieval Period." In: Genesis and Development of Tantrism,edited by Shingo Einoo. Tokyo: Institute of Oriental Culture, University of Tokyo, 2009. Institute of Oriental Culture Special Series, 23, pp. 124.
- Sanderson, Alexis. "The Śaiva Literature." Journal of Indological Studies (Kyoto), Nos. 24 & 25 (2012–2013), 2014, pp. 1–113.
- Beer, Robert (2003). The handbook of Tibetan Buddhist symbols. Serindia Publications. ISBN 1-932476-03-2, ISBN 978-1-932476-03-3 Source:  (accessed: Wednesday February 3, 2010)
- Davidson, Ronald. 2002. Indian Esoteric Buddhism. Columbia University Press. pg. 202, 218
- Davidson, Ronald. 2002. Indian Esoteric Buddhism. Columbia University Press. pg. 218
- Dictionary of Hindu Lore and Legend (ISBN 0-500-51088-1) by Anna L. Dallapiccola (London : Thames & Hudson, 2002).
- Kapalikas and Kalamukhas: Two Lost Saivite Sects (ISBN 0-520-01842-7) by David N. Lorenzen (Berkeley : University of California Press, 1972).
- Mattavilasaprahasana by Māni Mādhava Chākyār
- Ankalaparamecuvari : a goddess of Tamilnadu, her myths and cult (ISBN 3-515-04702-6) by Eveline Meyer (Stuttgart : Steiner Verlag Wiesbaden GMBH, 1986)
- The Blackwell Companion to Hinduism. by Gavin Flood. 2003. Malden: Blackwell.
- Indian Esoteric Buddhism. by Ronald Davidson. 2002. Columbia University Press.