OP NON-VASCULAR ANIMAL TISSUES. 191 



Fig. 2. A vertical section of a portion of the inferior extremity of the os feraoris. 

 Natural size. 



A. The horizontal lamella, to which in the recent state the articular 

 cartilage is firmly attached, and which separates the latter from the 

 cancelli of the bone. 



B. The vertical fibres of the cancelli ; these are implanted into the uppei 

 surface of the articular lamella. 



Fig. 3. A portion of the inferior extremity of the os femoris slightly magnified. 



A. The articular lamella. 



B. The cancelli of the bone. 



Fig, 4. Displays the manner in which the blood-vessels are disposed in the cells of 

 the cuboid bone, internal to the articular lamella. This lamella has been 

 rendered transparent, and the vessels are seen internal to it. 



Fig. 5. A vertical section of a cuneiform bone of the human foot, and of the arti- 

 cular cartilage which is implanted upon it. 



A. The interior of the bone. 



B. The articular lamella. 



C. The articular cartilage. 



Fig. 6, The blood-vessels of the intervertebral substance ; the arteries traverse the 

 fibrous portion, and terminate at the circumference of the central carti- 

 lage in large dilatations. 



Fig. 7- The semilunar fibro- cartilage of the knee-joint from a young human sub- 

 ject. 



A. The central part not containing blood-vessels. 



B. The external fibrous and vascular portion. 



PLATE XVr. 



Fig. 1. Represents the mode of distribution of the blood-vessels on the free surface 

 of the circumference of the cornea. (Magnified thirty diameters.) 



A. A portion of the cornea. 



B. The blood-vessels situated on the surface of the cornea, being covered 

 by the membrana conjunctiva. 



C. A portion of the membrana sclerotica. 



Fig. 2. Represents the blood-vessels which are situated in the substance of the 

 membrana sclerotica where the cornea is attached to it. (Magnified 

 thirty diameters.) 



A. The cornea. 



B. The sclerotic vessels. 



