title: THE NERVOUS SYSTEM OF HYDRA. I. TYPES, DISTRIBUTION AND ORIGIN OF NERVE ELEMENTS.
mesh_terms: D000818:Animals; D003063:Cnidaria; D004396:Coloring Agents; D005724:Ganglia; D006653:Histology; D006829:Hydra; D009417:Nerve Tissue; D009420:Nervous System; D013194:Staining and Labeling
chemical_list: D004396:Coloring Agents
keywords: COELENTERATA; GANGLIA; HISTOLOGY; NERVOUS SYSTEM; STAINS AND STAINING