MUSCLES OF THE HEAD. 



63 



18. M. submentalis (Fig*. 59 smt). 



Cuvier, transversus, I. c, p. 588. — Dugès, 4, sous-mentonnier. — Zenker, 

 m. lingualis (incon-ectly brought into connection with m. hyoglossns). 



This small muscle lies in the anterior angle of the lower jaw 

 between the dentary bones. It consists of transverse fibres which 



Fig. 58. 



Muscles of the throat, chest, and abdomen of Rana esculenta. 

 sm M. submaxiUaris. 



sm' Hinder portion of same arising from the anterior cornu of the liyoid bone. 

 (For other references see page 68.) 



pass from one bone to the other. Below it is covered by the most 

 anterior portion of the m. submaxiUaris. 



Its action is to approximate the sides of the lower jaw : according* 

 to Dugès (/, c, p. 123), it assists in closing the nostrils, by drawing 

 together the sides of the lower jaw and thus raising the premaxillae. 



