1881.] 



ANATOMY OF THE EPOMOPHORI. 



689 



The nasal cavities are brought into communication with the larynx 

 by a long canal, which extends backwards along the spine and enters 

 the pharynx directly opposite to the aperture of the larynx ; so that 

 the greater part of what we have called the pharynx would be 

 evidently more correctly termed the isthmus faucium. 



The walls of the larynx are ossified, enclosing a spacious cavity, 



Head and neck of Epomophoriis franquefi (ad. ^, natural size). 



The anterior {a. ph. s) and posterior {p. ph. s) pharyngeal saes are opened from 

 without, the dotted lines indieatiug the points where they commu- 

 nicate with the pharynx ; s, thin membranous septum in middle line 

 between the anterior pharyngeal saos of opposite sides ; s.m, Bterno- 

 mastoid muscle separating the anterior from the posterior sac. 



the anterior aperture of which (figs. 2 & 5) is protected by a very 

 large epiglottis (e), which rests against the rounded anterior extre- 

 mities of a pair of large crescent-shaped fibro-cartilaginous cushions 

 (c), which extend forwards from the anterior margins of the trian- 

 gular arytenoid cartilages (a). The true vocal cords are well deve- 

 loped and much longer than the false cords ; the ventricles are 

 spacious, and continued backwards between the true vocal cords and 

 the thyroid, forming large saceuli, and forwards between the false 

 vocal cords and the thyroid to its anterior margin, forming narrower 

 but much longer " saceuli laryngis." 



