title: The ultrastructure of arachnoid cell-clusters and developing arachnoid villi in the monkey, Cercopithecus callitrichus.
mesh_terms: D000818:Animals; D001099:Arachnoid / Q000166:cytology* / Q000254:growth & development; D000882:Haplorhini / Q000033:anatomy & histology*; D006651:Histocytochemistry; D006652:Histological Techniques; D008854:Microscopy, Electron