8 DISSECTION OF THE CAT 



and the remaining portion is the horizontal 

 ramus. The highest point of the ascending ramus 

 is the coronoid process. The mandible bears on 

 either side the following teeth : three incisors, 

 one canine, two premolars, and one molar, (Plate 



I., B.) 



The 'dental formula would be : i. f , c. \, pm. f , 

 m.f 



1 7. The Hyoid Arch, which passes from the un- 

 der side of the skull to the top of the larynx. It 

 is composed of a body and a pair of anterior and 

 posterior horns. The body of the hyoid is 

 formed by a single bone, the basi-hyal, which 

 forms the front part of the upper border of the 

 larynx. Each posterior horn extends around the 

 upper margin of the larynx, and is composed of 

 the thyro-hyal bone. Each anterior horn is com- 

 posed of the cerato-hyal, epi-hyal, and stylo-hyal 

 bones, and the tympano-hyal cartilage, which 

 unites with the skull. (Plate I., c.) 



B. — ^Vertebral Coliunn. 



The Vertebral or Spinal Column is composed of 

 seven cervical, thirteen dorsal, seven lumbar, three 

 sacral, and twenty-two caudal vertebrae. Each ver- 

 tebra is composed of a body and a neural arch 

 enclosing a neural canal and bears on either side 

 a transverse process and dorsally a neural process. 

 Between adjoining vertebrae, on each side, there is 



