title: Projections of individual axons in lamprey spinal cord determined by tracings through serial sections.
mesh_terms: D000818:Animals; D001369:Axons; D001921:Brain / Q000033:anatomy & histology; D005399:Fishes / Q000033:anatomy & histology*; D007395:Interneurons / Q000166:cytology; D009434:Neural Pathways; D013116:Spinal Cord / Q000033:anatomy & histology*; D013194:Staining and Labeling