DIGASTRIC. 113 



from the apex of the posterior process of the stylohyal ; it 

 runs over the outer surface of the depressor and is attached 

 to the body of the hyoid. 



C. 106. Occiput and hyoid bone of a Calf (Bos taurus), showing 

 the depressor maxillse inferioris (digastric) and stylohyoid 

 muscles. The mastoideo-styloideus portion of the stylohyoid 

 is more developed than in the Sheep and extends for a 

 considerable way down the inner surface of the stylohyal. 



C. 107. Skull of a foetal Seal (Plioua vitulin.a), showing the 

 monogastric depressor maxillse inferioris (digastric). The 

 anterior part of the left depressor shows signs of longi- 

 tudinal division. There is no tendinous intersection. 



Miller, Challenger Reports (Zool.), vol. xxvi. 1888, p. 215. 



C. 108. Head of a young Otter (Lutra lutra) with mastoideo- 

 styloideus, styloglossus, and parts of the depressor maxillse 

 inferioris muscles. The depressor (most of which has been 

 removed) is monogastric. The stylohyoid is represented 

 by its mastoideo-styloidean portion only. 



C. 109. Lower jaw of a Dog (Canis familiaris), showing the 

 depressor maxillse inferioris (digastric), mylohyoid, and 

 stylohyoid muscles. The depressor is of the monogastric 

 type, but sometimes as in this specimen shows a very 

 delicate tendinous intersection on a level with the angle of 

 the jaw. It is attached to the mandible near its middle. 

 The stylohyoid muscles are very slender, that on the right 

 sends a slip to the depressor, while the main part of the 

 muscle vanishes before reaching the hyoid. 



Presented by Prof. McFadyean. 



Ellenberger & Baum, Anat. des Hundes, Berlin, 1891, 

 p. 134. 



C. 110. Occiput and lower jaw of a Crested Baboon ( Cynopithe- 

 cus niger] , dissected to show the depressor maxillse inferioris 

 (digastric) muscles. The posterior belly on each side 

 terminates anteriorly in a long central tendon, which unites 

 with its fellow of the opposite side to form a tendinous 



i 



