Note 2 — Chapter III · DISEASE DEITIES.

The purvajas or spirits of deceased ancestors receive worship on the thirteenth or fourteenth day of the dark half of Shrāvan (the tenth month of the Gujarāt Hindu year), on the fourteenth of the dark half of Ashvin, on the death anniversaries and on days on which the Shrāddhas, tripindis or nil parnāvavi ceremonies are performed. On these occasions, the pitriyas (deceased ancestors) are represented by twisted braids of the durvā grass (cynodon dactylon).2