ANATOMY. 13 



'vertical. The sacrum is somewhat quadrangular; is 

 <;omposed of three bones which are consolidated at an 

 ■early age. Only three vertebral foramina. 



The bones of the coccyx are strong and tuberous, 

 the first five or six being as perfect as the true 

 vertebral bones. 



The pelvis of the Hog (Pig) resembles that of the 

 Sheep. The iliac crest is convex. The pubis is 

 narrow, and the ischium has a tuberous prominence. 

 The sacrum is composed of four vertebrae, which do 

 not become entirely consolidated for a length of time. 



Fig. 4. 

 Lateral Ligaments of the Sacrum and Pelvis. 



a, Superior Sacro-iliac Ligament ; b. Sacral Ligament ; c, Lateral Sacro-iliac 

 Ligament; d, Sacro-sciatic Ligament; e, Small Sciatic Notch;/, Great 

 Sciatic Notch . 



The spinous processes are absent. The spinal canal is 

 open above, due to the neural arch being deficient on 

 «ach side. 



THE PELVIC ARTICULATIONS. 



Five in number : sacro-lumbar, two sacro-iliac, the 

 ischio-pubic symphysis, the sacro-coccygeal articulations 

 and the ilio-sacral and sacro-sciatic ligaments. 



