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 l)order of its neural canal. 

 The stronff bundle of carneous fibres formino- 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 cither of them 

 acting independently will tend to pull the head towards 

 that side to which the contracting muscle belono^s. 



127. Tlie hiventer cei'vicis ^ 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 OERVICIS. 



Secundum par colli. Aldrovandi. 

 Digastricus. Steno. 

 Diinner Halsmuskel. Merrem. 

 Biventer cervicis. Wiedemann, p. 75. 



,, ,, Tiedemann, § 203. 



„ „ d' Alton (Zvveibauchiger 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 jMsticus (pt.). Owen. 



Lo7ig posterieur du cou (^faisceau occipitcd) . Gervais et Alix, p. 1 4. 

 Faisceau interne ou digastrique du long interejnneux cervical. Alix, 

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



