380 Grant Sherman Hopkins 



SUMMARY. 



1. The subcutaneous lymphatic vessels terminate in lym- 

 phatic sinuses at either end of the body. The lymph sinuses 

 at the base of the cranium empty into the jugular veins. 

 The pericardial lymph sinus opens into the preceding, the ori- 

 fice between the two sinuses being guarded by a valve ; the 

 flow of lymph is from the pericardial into the cephalic lymph 

 sinus. At the caudal end of the body the Ij'raph sinuses empty 

 into the caudal vein. These sinuses are considerably smaller 

 than the cephalic ones. 



2. The visceral lymphatic system is more voluminous than 

 the preceding. In addition to the small vessels extending 

 along the intestines, etc., there are three large lymph sinuses 

 situated, one along the right side of the air-bladder, and one 

 on each side of the oesophagus. The termination of the ab- 

 dominal lymphatics is in the ducts of Cuvier, there being sev- 

 eral openings from each of the lymph sinuses, at the sides of 

 the oesophagus, into the great venous trunks. 



3. A ciliated epithelium was found over the greater extent 

 of the stomach and in the rectum ; over the whole extent of 

 the cholecyst and its duct ; the air-bladder and the nasal cavity. 



Thanks are due Prof Gage for suggesting the subject of 

 this paper, and for kindly criticism of the same. 



Ithaca, N. Y. 



August 8, 1893. 



