508 



ARTHUR WILLIAM MEYER 



Fig. 21 Distal extremity of round ligament from a kitten 24 days old. Xo 

 remnant of the umbilical vein is present in the vascular connective tissue. X142. 



Fig. 22 Round ligament of a kitten 14 to 18 days old. No recognizable rem- 

 nant of the umbilical vein is present. The ligament is composed of a very loose 

 connective tissue not unlike embryonic connective tissue which looks gelat- 

 inous. X-'>4. 



Fig. 23 Transverse section from the free caudal border of suspensorj^ liga- 

 ment of the cat, containing a large vein with nothing but an endothelial wall 

 bounded by connective tissue. This vein bears no i-esemblance to the remnant 

 of the umbilical vein. X142. 



