8 



in the latter. It is most natural that this difference in the 

 order of entrance of the intestines should exist, for in the 

 human subject the transverse colon lies ventrad to the small 

 intestines, whereas in the cat it is placed dorsad to them. 



I feel under great obligations to Prof. C. S. Minot for his 

 kindness in verifying this piece of work, as well as for the 

 assistance he has afforded me in its production. 



ABBREVIATIONS. 



Am. 



Amnion. 



J. 



Jejunum. 



Al. 



Allantois. 



L. 



Liver. 



Al. art. 



Allantoic artery. 



L. u. V. 



Left umbilical vein. 



Ao. 



Aorta. 



CE. 



OEsophagus. 



C. 



Colon. 



S. 



Stomach. 



CCE. 



Caecum. 



U. V. 



Umbilical vein. 



C. u. c. 



Cavity of the umbilical cord. 



V. art. 



Vitelline artery. 



C. V. 



Cardinal vein. 



V. V. 



Vitelline vein. 



G. o. 



Great omentum. 



W. b. 



Wolffian body. 



I. 



Intestine. 



Yk. 



Cavity of yolk sack. 



