OF THE BATRACHIAN GEXUS HEMISUS. 



909 



1908.] 



but also by the anterior lateral processes of the body of thehyoid. 

 It is perhaps possible to compare the lateral foramina in the 

 hyoid of Brevicejjs with the lateral foramina of PelodyUs and 

 Pelohates. 



Text-fiiy. 180. 



StJv 



Hyoid of Hemistis guttatum and its musculature. Ventral aspect. 



h Anterior border of livoid : the letter points to the plate formed by the union ot 

 the thinner portion of the anterior cornua which imderlie the hyoglossus 

 nmscle which muscle ]iasses above them through the toramen_ thus formed. 

 St.h. Sternohyoid muscles (3), over which the hypoglossal nerve is seen to pass- 

 and to supply, by one branch, the hyoglossus muscle, io the left ot the figure 

 are seen the petrohyoidei. 



The anterior cornua near to the wall of the skull are bars of 

 translucent cartilage of approximately equal diameter throughout. 

 Towards its attachment to the body of the hyoid each bar gets much 

 wider as is shown in text-figure 179. The wider region of each 

 cornu'is due to the existence there of a semilunar tract of cartilage 

 reinforcing the outer edge of the bar and becoming excessively 

 thin alone its anterior convex border. This cartilage is perfectly 

 continuous with each cornu, but has the appearance of an 



