As the enclosed image shows, there is an idol of a golden lizard (svarna-godhika) to the left of Mother Bhavatarini at Dakshineswar.
What is the scriptural reason of this idol of lizard?
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Perhaps it is related to some local tradition of Bengal.
In the Chandimangala written in Bengali, Devi Bhagavati assumed a godhA (big-sized lizard) Form.
In the images of Goddess Parvati built in the middle ages, godhA is frequently seen with Devi.
(Reference : Satramulak Bharatiya Shaktisadhana,Upendrakumar Das, RMIC, vol.1, page 110).