SKELETON 



243 



is reduced; the post-temporal is vestigial, and suspended in ;i 

 ligament ; a very small cleithrum surmounts the clavicle, and the 



Fig. 211. 



Lepidosire.n paradoxa, Fitz. (After Bridge.) A, left-side view, ami 15, dorsal view of the 

 Skull. C, outer view of the left, and D, inner view of the right ramus of the lower jaw. 1, 

 nasal capsule ; 2, ethmoid ; 3 and 7, process of pterygopalatine ; 4, antorbital cartilage ; 5, 

 palatine tooth; 6, lateral (dermal lateral ethmoid); 8, occipital (fi on to-parietal) ; 9, pterygo- 

 palatine; 10, quadrate; 11, squamosal; 12, ceratohyal ; 13, subopercular and opercular;' 14, 

 cranial rib ; 15, parasphenoid ; 1(5, neural arch ; 17, neural spine ; IS, splenial tooth ; 1ft, splenial ; 

 20, Meckel's cartilage ; 21, articular cartilage ; 22, angular ; /, foramen for facial, g, for glosso- 

 pharyngeal, t, for trigeminal, and v, for vagus nerve. 



Fig. 21: 



Pectoral girdle of A, Ceratodus; B, Polypterus. Ventral view. (From Gegenbaur, Vergl. 

 Anat.) CI, clavicle ; CI', cleithrum ; g, articular facet for fin-skeleton. 



cartilage is subdivided into a ventral median piece, and two more 

 dorsal pieces supporting the fins. 



