E. Thurston Castes and Tribes Sthn India II 229: The racial position of Eurasians, and the proportion of black blood in their veins, are commonly indicated, not by the terms mulatto, quadroon, octoroon, sambo (or zambo), etc., but in fractions of a rupee. The European pure breed being represented by Rs. 0-0-0, and the Native pure breed by 16 annas (= 1 rupee), the resultant cross is, by reference to colour and other tests, gauged as being half an anna in the rupee (faint admixture of black blood), approaching European types; eight annas (half and half); fifteen annas (predominant admixture of black blood), approaching Native types, etc.at [X] annas in the rupee (adj.) under anna, n.