Marks worn by the Brahmins

From the book -
The Sundhya or the Daily Prayers of the Brahmins.
Illustrated in a series of original drawings from nature, demonstrating their attitudes and different signs and figures performed by them during the ceremonies of their morning devotions, and likewise their poojas.
By Mrs. Sophia Charlotte Belnos (b.1795)
Published by Day & Sons, London - 1851

Source: New York Public Library Digital Collection