190 MR. TOYNBEE ON THE ORGANIZATION AND NUTRITION 



Fig. 5. A plexus of blood-vessels situated between the synovial membrane and the 

 circumference of the articular cartilage ; from the same specimen as fig. 3. 



Figs. 6, 7, 8, 9 and 10. Diagrams of the inferior extremity of the os femoris, to show 

 the relations of the blood-vessels with the articular cartilage, and the 

 osseous nucleus of the epiphysis, during the different periods of their de- 

 velopment. 



Fig. 11. Vessels situated between the attached synovial membrane and the articular 

 cartilage, at the point where the ligamentum teres is inserted in the head 

 of the OS femoris of the human subject, between the third and fourth 

 months of foetal life. (Magnified thirty diameters.) 



A. The surface of the articular cartilage. 



B. The vessels between the articular cartilage and the synovial mem- 

 brane. 



C. The surface to which the ligamentum teres was attached. 



D. The vein. 



E. The artery. 



PLATE XIV. 



Fig. 1. Vessels similarly situated to those of fig. 11. Plate XIII. but between the 

 seventh and eighth months of foetal life. (Magnified thirty diameters.) 



A. The surface of the articular cartilage. 



B. The vessels between the articular cartilage and the synovial mem- 

 brane. 



C. The surface to which the ligamentum teres was attached. 



Fig. 2. Vessels situated between the synovial membrane and the articular cartilage 

 on the circumference of the condyle of the os femoris of the human fcetus, 

 at the period of birth. In one part the arteries are observed to terminate 

 in a single vessel from which the veins take their origin ; in another part 

 the arteries communicate with the veins by means of loops. (Magnified 

 thirty diameters.) 



A. The surface of the articular cartilage. 



B. The vessels between the attached synovial membrane and the arti- 

 cular cartilage. 



C. The reflexed synovial membrane. 



D. The lateral surface of the condyle of the femur. 



PLATE XV. 



Fig. 1. Vessels situated between the attached synovial membrane and the articular 

 cartilage at the circumference of the head of the metatarsal bone of the 

 human subject. 



