Intestinal Epithelium of Bufo Lentiginosus. 



271 



place, a small cut was made through the abdominal wall of several 

 Bufo larvae, one day after hatching. In some cases these healed so 

 rapidly that development went on normally, but in several indi- 



c, coil; dm. 



Fig. a. Rana palustris. Ventral. X 10. 

 I. Two days after hatcliiug. 

 II. Three days after hatching. 



III. Four days after hatching. 



IV. Six days after hatching. 



duodenum ; oe., oesophagus ; rect., rectum ; st., stomach 



point at which the differentiation of coil from yolk mass takes place. 



viduals as the coil developed it pushed through the opening in the 

 body wall, forming a hernia outside the body. In these cases the 

 stomach, which was not crowded by the coil, remained on the left. 

 Of these individuals none lived over four days. 



