434 HOPKINS. [Vol. XI. 



as residual structures of the embryonic period. Doubtless 

 they are of little importance. Possibly they facilitate the 

 dissemination of the gastric juice and other fluids secreted by 

 the stomach. 



Acknowledgments. 



The writer is indebted to Professors Wilder and Gage of the 

 Anatomical Department for kindly assistance and encourage- 

 ment, for material, and for the loan of numerous papers bear- 

 ing upon the subject; for all of which most grateful thanks are 

 extended. 



To Professor H. E. Summers, for material sent by him from 

 Knoxville, Tenn.; to Mr. M. G. Schlapp, special student in the 

 University, for procuring material from the Mississippi River; 

 and finally to the Buffalo Fish Co., of Buffalo, N. Y., for the 

 generous supply of sturgeon material. 



