270 THE MYOLOGY OF THE RAVEN. 



side, a powerfully developed muscle, arising, some- 

 what tendinous, in the median line, upon the anterior 

 aspect of the second cervical vertebra, all the way 

 from the summit of its neural spine to the mid- 

 point of the supero-anterior border of its neural canal. 

 The strong bundle of carneous fibres forming the 

 muscle diverge as they proceed to the occiput from this 

 linear origin, and are inserted upon a crescentic area 

 at the back of the skull. This insertion is within the 

 occipital line, being convex outwards, and situated well 

 towards the mastoidal aspect of the cranium (Fig. 4). 

 Evidently the united action of these muscles will tend 



> 



to extend the head upon the neck, and either of them 

 acting independently will tend to pull the head towards 

 that side to which the contracting muscle belongs. 



127. Tlie biventer cervicis 1 of Wiedemann is an ex- 

 ceedingly interesting muscle, or rather pair of muscles, 

 though they are well separated from each other. Upon 

 looking at the back of the neck of a Raven from 



1 " M. BIVENTER CERVICIS. 



Secundum par colli. Aldrovandi. 

 Digastricus. Steno. 

 Diinner Halsniuskel. Merrem. 

 Biventer cervicis. Wiedemann, p. 75. 

 ,, ,, Tiedemann, 203. 



,, ,, d'Alton (Zweibiiuchiger Nackenmuskel), p. 8, 



No. 2. 



Gurlt, p. 17. 



Selenka, p. 95, No. 5. 



,, Watson, p. 61. 



,, Meckel, System, p. 295, No. 1. 



Digastrique du cou. Cuvier. 

 Longus colli posticus (pt.). Owen. 



Long posterieur du cou (faisceau occipital) . Gervais et Alix, p. 1 4. 

 Faisceau interne ou digastrique du long interejnneux cervical. Alix, 

 p. 379." (Gadow in Bronn's Klassen, loc. cif.., p. 107.) 



