THE HEAD AND NECK 



1245 



The lingualis inferior is disposed as a round bundle on the 

 inferior surface of the tongue. Posteriorly it lies between the 

 insertions of the genio-hyo-glossus internally and the hyo-glossus 

 externally, and anteriorly between the former muscle internally 

 and the stylo-glossus externally. The muscle extends from the 

 tip of the tongue to the body of the hyoid bone, with which it is 

 connected. 



The lingualis transversus constitutes a layer of considerable 

 thickness, which is placed between the lingualis superficialis and 



Fig. 5o8. — Longitudinal Section of the Tongue of a Cat (injected). 



1. Mucosa 



2. Lingiialis Superficialis 



3. Lingualis Transversus et Verticalis 



4. Lingualis Inferior 



lingualis inferior. It arises from the median septum, and extends 

 outwards, the upper fibres cur^-ing upwards, to be inserted into the 

 mucous membrane of the side of the tongue and adjacent portion 

 of the dorsum. This muscular stratum is interspersed with fat, 

 id is much broken up by fibres of the lingualis verticalis and genio- 

 lyo-glossus. 

 The lingualis verticalis extends from the mucosa of the dorsum to 

 lat of the inferior surface. Its fibres describe cur\'es, having the 

 )nvexities directed inwards, and they decussate freely with the 

 ibres of the lingualis transversus. 



