"Entosternum of one of the mygalomorphous spiders; ventral surface. Ph.N., pharyngeal notch. The posterior…
"Dorsal surface of an entosternum. Ph.N., pharyngeal notch." — The Encyclopedia Britannica, 1910
"1, primitive carotid artery dividing itself into carotid external and carotid internal; 3, occipital…
The larynx viewed from its pharyngeal opening. The back wall of the pharynx has been divided and its…