128 



THE ANATOMY OF VEETEBRATED ANIMALS. 



In the latter case, which is that met with in the Sharks 

 and Rays (Figs. 34 & 35), a single cartilaginous rod (g) is 

 inoveably articulated with the skull, in the region of the 

 periotic capsule, upon each side; and, by its opposite ex- 

 tremity, is connected by ligamentous fibres both with the 

 palato-quadrate (/(), and with the mandibular or Meckelian 

 cartilage {Mn). This cartilaginous susjiensorium represents 



Fig. 33. 



Fig. 33. — Vertical section of the skull of Chimeera monstrosu, without 

 the labial and nasal cartilages : — A^ the basi-occipital region ; P, 

 the pituitary fossa; Na, partition between the olfactory sacs; B, 

 alveolus for the anterior upper jaw tooth ; C, D, the region of the 

 triangular cartilage which answers to the hyomandibular and quad- 

 rate ; D, B, that which answers to the quadrate, pterygoid, and 

 palatine ; Mn, the mandible ; lOr, the interorbital septum ; asc and 

 psc, the anterior and posterior semicircular canals ; I., II., V., VIII., 

 exits of the olfactory, optic, fifth and eighth pairs of nerves. 



the hyomandibular and the symplectic bones of the Teleostei, 

 and gives attachment to the hyoidean apparatus {Hij). The 

 latter consists of a lateral arch upon each side, united with 

 its fellow, and with the branchial arches, by the intermedia- 

 tion of medial basal elements below; and it is succeeded 

 by a variable number of similar arches, which support the 

 branchial apparatus. 



