128 Prof. A. Macalister on the Muscular Anatomy 



downwards to the inner half of the upper edge of the orhicii- 

 larls imliwhrarimi^ extending into the origin of the levator 

 lahii super ioris. 



The large auricle had a powerful arrangement of muscles 

 for its motions, having three series of transverse intrinsic 

 fibres on the back of the concha, and a strons; bilaminar 

 retraliens aurem^ which came from tlie occipital protuberance, 

 external and attached to the occipitalis^ and was inserted by 

 the superficial layer of fibres into the back of the auricle; 

 the deep layer bifurcated into two muscular bundles — an upper 

 to the upper and anterior part of the auricle, and a lower to 

 the inferior part of the same cartilage. 



The attollens aureni was thin and wide ; and the attrahens 

 was a very strong wide slip, inseparable from the pilatysma ; 

 a second special attrahens existed in the form of a flat fleshy 

 slip from the anterior half inch of the temporal crest behind 

 the postorbital process, which ran downwards and backwards 

 over the temporal fascia and zygomatic arch to the inferior 

 margin of the helix : the lowest third of this muscle is tendi- 

 nous. The other facial muscles were a single-headed levator 

 lahii superioris alceque nasi, a dejjressor lahii inferior is, and 

 levator menti. I found no muscles attached to the angle of 

 the mouth other than the wide continued sheet of the pla~ 

 tysma. The 07-hicularis oris was strong, but the buccinator 

 was very feeble. A depressor lahii superioris from the upper 

 alveolar arch completes tlie catalogue. There was no zygo- 

 matic or buccal salivary gland. 



The masticatory muscles were arranged as in all the 

 Marsupials, and equalled the pectorals in Aveight {masseteres + 

 tem2)orales=l'4: oz.). 



The external pterygoid is an exceedingly small rudiment, 

 crossing and inseparable from the internal. 



The sterno-mastoid was four times the size of the cleido- 

 masfoid, and was inserted fleshy into the outer side of the 

 elongated paroccipital process. The latter had a tendinous 

 insertion, and was attached more internally to the same pro- 

 cess ; its origin was by a fine flat fleshy band from the inner 

 sixth of the clavicle. 



The omo-liyoid arose far back from the proBScajnila near its 

 superior angle ; it had no tendinous inscription, and was in- 

 serted into the hyoid body and into a tendinous line in the 

 angle between the digastric and sterno-hyoid muscles, to both 

 of which it is connected. Tlie posterior belly of the digastric 

 is exceedingly small and short, and arises from the front of tlie 

 paroccipital process ; it ends in a tendinous inscription wliich 

 gives partial origin to the anterior belly; but this latter part 



