6 ZOO TOM Y. 



9. The cornual cartilages (Fig. i, c.c\ small, irregular, 

 horizontal pieces, connected by fibrous tissue to the distal 

 ends of the styliform processes. 



10. The posterior dorsal cartilage (Figs, i and 4, 

 p.d\ an arched plate, bilobed anteriorly, and truncated 

 posteriorly, where it enters into fibrous union with the 

 anterior edge of the hard palate. 



11. The anterior dorsal cartilage (Figs, i and 4, 

 a.d), situated in front of and partly overlapped by the fore- 

 going ; it is strongly arched from side to side, ends in front 

 in a thin rounded edge, and posteriorly is produced on each 

 side into a downwardly directed process. 



12. The anterior lateral cartilages (Fig. i, a. I), 

 situated one on either side, just in front of the descending 

 process of the anterior dorsal cartilage ; their form is some- 

 what sigmoidal. 



13. The posterior lateral cartilages (Fig. i, /./), 

 flattened plates, situated one on either side beneath the pos- 

 terior dorsal cartilage, and between the descending process 

 of the anterior dorsal caitilage, and the anterior lateral 

 process of the subocular arch. 



14. The lingual cartilage (Figs, i and 4, Ig), a long 

 median ventral piece, flattened from side to side, truncated 

 in front, and tapering posteriorly ; by its anterior end it is 

 united by fibrous tissue to a small cartilage (lg*} having the 

 form of a semicircle, and set transversely : with the free, 

 upwardly directed ends of this are connected two small 

 irregular cartilages (lg"}. The lingual cartilage lies in the 

 floor of the mouth ; the semicircular cartilage (lg'} sup- 

 ports the median portion of the tongue ; the small cartilages 

 (/") lie in the lateral wings of the tongue ( 23, 

 Fig. 4, /,/'). 



15. The median ventral cartilage (Figs, i and 4, 



