A narrowing of the muscle was observed at the limit of the transition between the esophagus and the stomach. This transition
is marked internally by the absence of papillae and by the gastroesophageal sphincter (Fig. 1). However, in this region, a
pouch-shaped region was observed in two specimens of C. mydas, characterizing an esophageal diverticulum. The mucosa of the esophageal diverticulum lacked esophageal papillae