The Neo-theosophy of Annie Besant and C. W. Leadbeater replaced Blavatsky's "Higher Manas" principle with the "Higher Mental", "Abstract Mind" (as opposed to Lower Mental or "Concrete Mind"), or Causal Body.
The Neo-theosphical concept of Causal Plane proved very influential both in India (via the Adyar branch of Theosophy) and in the New Age, via Alice Bailey.