title: Segmentation and segmental differentiation in the development of the central nervous systems of leeches and flies.
authors.affiliation: Department of Biological Sciences, Columbia University, New York, New York 10027.
authors.forename: M
authors.initials: M
authors.lastname: Levine
authors.forename: E
authors.initials: E
authors.lastname: Macagno
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002490:Central Nervous System / Q000166:cytology / Q000196:embryology*; D004175:Diptera / Q000033:anatomy & histology / Q000196:embryology*; D007865:Leeches / Q000033:anatomy & histology / Q000196:embryology*