HEAD AND NECK. 109 



C. 90. Portion of the hyoid bone of a Horse (Equus caballus), 

 showing the hyoideus latus passing between the posterior 

 cornu and the ceratohyal on either side, and a muscular 

 band (hyoideus transversus) that unites the upper ends of 

 the ceratohyals over the base of the tongue. 



Presented by Prof. McFadyean. 



C. 91. Anterior portion of the lower jaw of a Seal (P/ioca vitidind) 

 showing the muscles of the intermandibular space. The 

 mylohyoid is divided into two parts. The one situated 

 25 mm. behind the symphysis passes directly from one 

 mandible to the other, and has much the characters of the 

 transversus mandibulae of Rodents. The second portion lies 

 posterior and slightly dorsal to the first, its fibres pass 

 obliquely forwards towards the mid-line, and there unite in 

 a median raphe. The space in front of the mylohyoid is 

 occupied by the anterior part of the geniohyoid. 



C. 92. Hyoid bone and epiglottis of a Dog (Canu familiaris), 

 showing a well developed hyo-epiglottidean muscle. It 

 arises by a separate head from the lower end of each cerato- 

 hyal ; both heads pass backwards and upwards, unite, and 

 are inserted in common upon the anterior surface of the 

 epiglottis. 0. C. 64 z q. Presented by Prof. McFadyean. 



C. 93. Head, thorax, and proximal part of the fore limbs of a 

 Lemur (Lemur mongoz), showing the superficial muscles on 

 the left, the deep on the right. The following points may be 

 noted : 



(On the Left side). The division of the deltoid into three 

 parts is very distinct The two heads of the biceps are 

 almost entirely separate, being only slightly joined towards 

 their distal end. This condition is more usually found in 

 Galago than in Lemur. (On the Right side). The cleido- 

 mastoid is independent of the sterno-mastoid. The omo- 

 hyoid has no tendinous intersection. The depressor 

 in axilla? inferioris (digastric) is strongly digastric, a slender 

 tendon (indicated by black bristles) passes from its inner 

 border to the mylohyoid.. 0. C. 64 M bf. 



Presented by Prof. F. G. Parsons. 

 Murie & Mivart, Trans Zool. Soc.. vol. vii. 1872, p. 12. 



