1901.1 



THE MUSCLES OF THE TTNGULATA. 



663 



met with amoag the BovidiB and Cervidae, and which rises by its 

 apex from the same point as tlie last muscle, but the diverging 

 fibres run up instead o£ down. "We hesitate to homologize this 

 with Man's corrugator supercilii because it is very superficial and 

 is not covered by the orbicularis palpebrarum (see text-figs. 86 

 and 87). 



Text-fig. 87. 



Facial muscles of the Mouflon. 



Levator labii superioris, 



I Retractores iiaris. 



Zygomaticus. 



Buccinator. 



Orbicvilaris oris. 



Depressor labii inferioris. 



Lachrymalis. 



Rudimentary suborbital gland. 



10. Orbicularis palpebrarum. 



11. Frontalis. 



I Attrahens aurem superior. 



„ ,, medius. 



,, ,, inferior. 



Parotido-auricularis. 



12. 

 13. 

 14. 



15. 

 16. 



17. Triangularis frontis. 



Occipito-frontaUs. — The frontalis portion of this muscle is always 

 feeble, and in horned animals is often suppressed ; the occipitalis, 

 on the other hand, rises from the occipital crest and, if looked for. 

 can usually be satisfactorily displayed. 



Depressor labii inferioris forms a single sheet, rising from the 

 mandible and being inserted into the lower lip. 



Muscles of the Ear. 



The most satisfactory method of describing these muscles seems 

 to be to follow Watson's example, and to divide them, as he did in 

 the Indian Elephant (XXX.), into an anterior group of attrahentes, 

 a superior of attoUentes, and a posterior of retrahentes, A detailed 

 description of them in all the Ungulates which have come under 

 our notice would need a special paper, but we have satisfied our- 

 selves that they not only vary a good deal in different animals, but 

 in different specimens of the same animal. 



