diff --git a/interfaces/cython/cantera/_cantera.pxd b/interfaces/cython/cantera/_cantera.pxd
index 3a0eeedc9..a149fb764 100644
--- a/interfaces/cython/cantera/_cantera.pxd
+++ b/interfaces/cython/cantera/_cantera.pxd
@@ -561,11 +561,13 @@ cdef extern from "cantera/cython/wrappers.h":
     cdef void tran_getMultiDiffCoeffs(CxxTransport*, size_t, double*) except +
     cdef void tran_getBinaryDiffCoeffs(CxxTransport*, size_t, double*) except +
 
-
-cdef string stringify(x)
-
+# typedefs
 ctypedef void (*thermoMethod1d)(CxxThermoPhase*, double*) except +
+ctypedef void (*transportMethod1d)(CxxTransport*, double*) except +
+ctypedef void (*transportMethod2d)(CxxTransport*, size_t, double*) except +
+ctypedef void (*kineticsMethod1d)(CxxKinetics*, double*) except +
 
+# classes
 cdef class _SolutionBase:
     cdef CxxThermoPhase* thermo
     cdef CxxKinetics* kinetics
@@ -591,6 +593,12 @@ cdef class Kinetics(_SolutionBase):
 cdef class InterfaceKinetics(Kinetics):
     pass
 
+cdef class Transport(_SolutionBase):
+     pass
+
+cdef class DustyGasTransport(Transport):
+     pass
+
 cdef class Mixture:
     cdef CxxMultiPhase* mix
     cdef list _phases
@@ -711,3 +719,12 @@ cdef class ReactionPathDiagram:
     cdef str element
     cdef pybool built
     cdef CxxStringStream _log
+
+# free functions
+cdef string stringify(x)
+cdef pystr(string x)
+cdef np.ndarray get_species_array(Kinetics kin, kineticsMethod1d method)
+cdef np.ndarray get_reaction_array(Kinetics kin, kineticsMethod1d method)
+cdef np.ndarray get_transport_1d(Transport tran, transportMethod1d method)
+cdef np.ndarray get_transport_2d(Transport tran, transportMethod2d method)
+cdef CxxIdealGasPhase* getIdealGasPhase(ThermoPhase phase) except *
diff --git a/interfaces/cython/cantera/kinetics.pyx b/interfaces/cython/cantera/kinetics.pyx
index 1216fd94e..6246c7d23 100644
--- a/interfaces/cython/cantera/kinetics.pyx
+++ b/interfaces/cython/cantera/kinetics.pyx
@@ -1,5 +1,3 @@
-ctypedef void (*kineticsMethod1d)(CxxKinetics*, double*) except +
-
 # NOTE: These cdef functions cannot be members of Kinetics because they would
 # cause "layout conflicts" when creating derived classes with multiple bases,
 # e.g. class Solution. [Cython 0.16]
diff --git a/interfaces/cython/cantera/transport.pyx b/interfaces/cython/cantera/transport.pyx
index dc4ad7160..aa509cefa 100644
--- a/interfaces/cython/cantera/transport.pyx
+++ b/interfaces/cython/cantera/transport.pyx
@@ -1,6 +1,3 @@
-ctypedef void (*transportMethod1d)(CxxTransport*, double*) except +
-ctypedef void (*transportMethod2d)(CxxTransport*, size_t, double*) except +
-
 # NOTE: These cdef functions cannot be members of Transport because they would
 # cause "layout conflicts" when creating derived classes with multiple bases,
 # e.g. class Solution. [Cython 0.16]