  The Calculus of Wrapped Compartments (CWC) is a recently proposed modelling
language for the representation and simulation of biological systems behaviour.
Although CWC has no explicit structure modelling a spatial geometry, its
compartment labelling feature can be exploited to model various examples of
spatial interactions in a natural way. However, specifying large networks of
compartments may require a long modelling phase. In this work we present a
surface language for CWC that provides basic constructs for modelling spatial
interactions. These constructs can be compiled away to obtain a standard CWC
model, thus exploiting the existing CWC simulation tool. A case study
concerning the modelling of Arbuscular Mychorrizal fungi growth is discussed.
