

340 



APPENDIX. 



Fig. 3. 



d- 



down to the base of the cranium. It joins the occipital, 

 to the parietal bones, above, and the temporal bones 

 below. There are two little bones marked d, d, called 

 ossa triquetra, from their triangular shapes. They are 

 familiarly known to anatomists by the name of Ossa 

 Wormiana, from their being first described by Olaus 

 Wormius. 



The squamous sutures e, e, is so named because the 

 temporal bones overlap the parietal, like a scale. They 

 are on each side of the head behind the ears. 



OS FEMORIS. THE THIGH BONE. 



There are some parts of the os femoris which cannot 

 be seen, and explained as this bone is represented in the 

 skeleton. We therefore give an ad- 

 ditional figure of it here, with explana- 

 tions. 



The head, a, Fig. 3, forms the 

 greater part of a sphere. It articu- 

 lates with the hip, and is the most 

 perfect instance of the ball and socket 

 joint in the system. For additional 

 security, this joint, unlike any other, 

 has a short ligament attached in the 

 hollow b, and to the bottom of the cup 

 in the hip bone. The neck, c, is the 

 oblique space between the trochanter 

 and head of the bone. The large 

 process d, is the trochanter major, and 

 e, the trochanter minor. The curved 

 liney, extending from one trochanter 

 to the other, is the linea quadrata, 

 being the point where the muscle 

 called the quadratus femoris is at- 

 tached. The body of the bone g, has 

 a long rough elevated line h, called 

 the linea aspera. The outer condyle, 

 i, is opposite to the inner condyle, k. 

 The condyles have four articular at- 

 tachments, two of which are marked 

 by u, o, where the the tibia is attach- 

 e d 4 The recess p, affords a safe pas- 



