ABBREVIATIONS CSEI) IX THE FIGURES. 



c. m. — eoelomic muss. 

 c. r. — ciliary band of ectoderm. 

 cc. — ectoderm. 



(<'. <</'. — ectoderm of oral field. 

 ec. rj -a— ectoderm of extra oral field. 

 vs. — esophagus. 

 </. e. — gastric epithelium. 

 i. s. — inner surface of gastric epithe- 

 lium. 

 /. /.—lateral lobe of ciliary band. 



m. — mouth. 



mes. /i. — mesoblastic pouch. 



mes'y. C. — mesenchyme cells. 



n.c. — notochord. 



a. e. — remnant of outer secreting ends 

 of gastric epithelial cells. 



n. s. — outer surface of gastric epithe- 

 lium. 



St. — stomach. 



tent. — tentacle of ectoderm. 



