Here are the data structures with brief descriptions:

Cbisecting_kmeans_result_t
Cktuple_param_t
Clist_elem_s
Clist_t
Clog_t
Cmseq_t	Structure for storing multiple sequences
Copts_t
Cprogress_t
Csortwithindex_t
Csymmatrix_t	Symmetric matrix structure
Ctree_t	Guide-tree structure
Ctwo_ints_t