THE EAR. 



J97 



low sepinm^ wliicli bears the crista acustica (cr) on its free border ; 

 seen from above the crista acustica (Fig. 249 II, aa, cr) has concave 



Fig. 247. 

 ea 



Tlie right menibranovis labyrinth 

 seen from the 

 aa Antei'ior ampulla. 

 ae External ampulla 

 ap Posterior ampuUa. 

 apn Apertura partis neglectae. 

 au Apertura utriculi. 

 ca Anterior semicircular canal. 

 ce External semicircular canal. 

 cp Posterior semicircular canal 

 cits CanaUs utriculo-saccularis. 

 de Ductus endolymphaticus. 

 I Lagena cochleae. 



of Maiia esculenta ; after Retzius. Magnified 20 times. 

 inner side ; Fig. 248 seen from the outer side. 



Fig. 247 



mn Macula acustica negleota. 

 ms Macula acustica sacculi. 

 imt Macula acustica recessus 



utriculi. 

 pb Pars basilaris cochleae. 

 pi Papilla ac. lagenae. 

 ppb Papilla ac. basilaris 

 raa Ramulus ac. anterioris. 

 i-ae Ramulus amp. externae. 

 rap Ramulus amp. posterioris. 



rb Ramulus basilaris. 



rcc Recessus utriculi. 



rl Ramiilus lagenae. 



»•« Ramulus neglectus. 



rs Ramulus saccuU. 



,« Saccule. 



sp Sinus utriculi posterior.- 



ss Sinus utriculi superior. 



Iv Tegmentum vasculosum. 



u Utriculus. 



borders anteriorly and posteriorly; the ends are broad, rounded, and 



