Reference was above made to the primitive Shamanistic ideas which still survive beneath the Buddhist and the later lamaistic systems. In the central and eastern provinces of Ui and Tsang this pre-Buddhist religion has again struggled to the surface, or rather persisted under the name of _Bonbo_ (_Boa-ho_) side by side with the national creed, from which it has even borrowed many of its present rites. From the colour of the robes usually worn by its priests, it is known as the sect of the "Blacks," in contradistinction to the orthodox "Yellow" and dissenting "Red" lamaists, and as now constituted, its origin is attributed to Shen-rab (Gsen-rabs), who flourished about the fifth century before the new era, and is venerated as the equal of Buddha himself. His followers, who were powerful enough to drive Buddhism from Tibet in the tenth century, worship 18 chief deities, the best known being the red and black demons, the snake devil, and especially the fiery tiger-god, father of all the secondary members of this truly "diabolical pantheon." It is curious to note that the sacred symbol of the Bonbo sect is the ubiquitous svastika, only with the hooks of the cross reversed, [Symbol] instead of [Symbol]. This change, which appears to have escaped the diligent research of Thomas Wilson[400], was caused by the practice of turning the prayer-wheel from right to left as the red lamas do, instead of from left to right as is the orthodox way. The common Buddhist formula of six syllables--_om-ma-ni-pad-me-hum_--is also replaced by one of seven syllables--_ma-tri-mon-tre-sa-ta-dzun_[401].