FIG. 580. DIAGRAM OF THE RIGHT MEMBRANOUS LABYRINTH. 



/, utricle; 2, superior semicircular canal; 3, posterior semicircular canal; 4, ex- 

 ternal semicircular canal; 5, saccule; 6, endolyrnphatic duct; 7 and ?', canals con- 

 necting utricle and saccule respectively with the endolymphatic duct; 8, endo- 

 lymphatic sac; 9, cochlear duct; 9', its vestibular cul-de-sac (cecum vestibulare) ; 

 9", its terminal cul-de-sac (cecum cupulare); 10, canalis reuniens. (After Testut.) 



FIG. 581. THE ISOLATED MEMBRANOUS LABYRINTH. 



/, utricle; 2, saccule (opened); 3, location of the macula acustica sacculi; 4, am- 

 pulla of a semicircular canal; 5, canalis communis. Low magnification. (After 

 Riidinger.) 



690 



