Published online by Cambridge University Press: 20 November 2018
This paper is concerned with the residual spectrum of the hermitian quaternionic classical groups $G_{n}^{\prime }$ and $H_{n}^{\prime }$ defined as algebraic groups for a quaternion algebra over an algebraic number field. Groups $G_{n}^{\prime }$ and $H_{n}^{\prime }$ are not quasi-split. They are inner forms of the split groups $\text{S}{{\text{O}}_{4n}}$ and $\text{S}{{\text{p}}_{4n}}$. Hence, the parts of the residual spectrum of $G_{n}^{\prime }$ and $H_{n}^{\prime }$ obtained in this paper are compared to the corresponding parts for the split groups $\text{S}{{\text{O}}_{4n}}$ and $\text{S}{{\text{p}}_{4n}}$.