400 ROBERT J. TERRY 



participate in forming the crista senaicircularis and probably, to 

 some extent, give origin to the alar cartilages. 



28. The paranasal cartilages, paired, arise independently and 

 are primarily adapted to the diverticula of the recessus laterales. 

 They participate with the parieto-tectal cartilages in the forma- 

 tion of the semicircular crests and in the origin of the maxillo- 

 turbinal processes. From this cartilage the inferior obhque 

 muscle of the eye arises. 



29. The foramen epiphaniale is the vestige of the original 

 space between the parieto-tectal and paranasal cartilages. 



30. The lamina antorbitahs, paired, arises independently, 

 and unites secondarily with the paranasal and septal cartilages. 

 From it are formed the posterior cupola and the bases of the 

 ethmo-turbinals I and 11. 



31. The ethmoidal skeleton of cat may be compared with that 

 of Lacerta as follows : the region of alar cartilages in the cat and 

 the anterior zone of the lizard; tectum nasi and lamina trans- 

 versahs anterior of the cat with the zona annularis of the hzard ; 

 the combined paranasal and antorbital parts of the cat with 

 the posterior zone of the saurian. 



