  Pseudoalgebras, introduced in [BDK], are multi-dimensional analogues of
conformal algebras, which provide an axiomatic description of the singular part
of the operator product expansion.
  Our main interest in this paper is the pseudoalgebra Cend_n, which is the
analogue of an algebra of endomorphisms of a finite module. We study its
algebraic properties. In particular, we introduce the class of unital
pseudoalgebras and describe their structure and representations. Also, we
classify pseudoalgebras algebraically similar to Cend_n.
