92 The Alligator and Its Allies 



is very thin, but increases in thickness more and 

 more as it passes cephalad. A short anterior and 

 a long posterior portion may be distinguished. 

 The former extends from the inner side of the right 

 to that of the left half of the lower jaw, without 

 a median aponeurosis. The hinder half of this 

 muscle is united by a pair of aponeuroses to the 

 lower jaw, on one hand (the smaller part), and to 

 a fascia, on the other hand (the far larger part), that 

 separates several of the neck muscles. The smaller 

 part begins immediately behind the pterygoid on 

 the inner side of the halves of the lower jaw but 

 ends on the outer side of the two halves of the jaw. 



Latus Colli (Latissimus colli accessorius) . Lies 

 underneath the preceding. Its muscle bundles lie 

 between the collo-capitis muscle and the bodies of 

 the first three cervical vertebras, and form a broad 

 band that extends from the hyoid bone to the 

 backwardly directed cervical ribs of the first and 

 second pairs. 



Coraco-ceratoideus (Omo-hyoideus, Coraco-hy- 

 oideus). A long, narrow, and moderately thick 

 muscle which takes its origin from the upper border 

 of the coracoid, where the latter touches the scapula. 

 It extends forward near the oesophagus and at- 

 taches itself to about the middle of the backwardly 

 turned border of the horn of the hyoid of that side. 



Episterno-ceratoideus (Niederzieher des Zungen- 

 beins, or Brustbeinzungenbeinmuskel, Sterno-hy- 

 oideus). A flat and fairly broad muscle which 



