TRACHYSTOMATA

‖Tra′chy‐stom″a‐ta (?), n. pl. [[NL.,fr.Gr. � rough + stoma.]] (Zoöl.) An order of tailed aquatic amphibians, including Siren and Pseudobranchus. They have anterior legs only, are eel-like in form, and have no teeth except a small patch on the palate. The external gills are persistent through life.