THE EAE. 



401 



and behind the lagena. It forms a small^ oval, pocket-like protu- 

 berance, with the long- axis directed from in front and above, back- 

 wards and ontwards, its opening- being directed forwards and 



Fig. 250. 

 I 11 



V /?^ 



/^'■o^J, 







jg?>^ 'ape 



VJI 



??il- ""J" 



The membranous labyrinth of Rana cscuUnta ; after Retzius. 

 I. Transverse section of tlie anterior ampulla. Magnified 50 times. 

 II. Piece from under surface of the cupula from the anterior am jiulla. Vérick's Syst. , Obj .VIII. Oc. 3. 



III. The macula acustica neglecta, seen from below. Vérick's Syst., Obj. IV, Oc. 3. 



IV. Part of wall of the anterior ampulla. 



V. Part of the cochlea, the pars basilaris cut longitudinally. Vérick's Syst., Obj. I, Oc. 3. 

 VI. Longitudinal section of the pars basOaris. Vérick's Syst., Obj. I, Oc. 3. 

 VII. The macula ac. neglecta, seen from below. Vérick's Syst., Obj. IV, Oc. 3. 

 VIII. The pars basilaris, seen from behind and the outer side. Vérick's Syst., (Dbj. I, Oc. 3. 

 IX. Transverse section of the external ampulla. Magnified 175 times. 



ap6 



dip 

 mh 



mt 



Oval opening into sacculo-cochlear space. n 



Crista acustica. ph 



Cupula terminalis. pe' 



Ductus ijerilymphaticus. ppb 



Section of thinner waU of pars ba.si- r 



laris. rh 



Tectorial membrane. rn 



Thickened membranous wall. tv 



Nerve-fibres. 

 Pars basilaris. 



Area of coarsely granular cells. 

 Papilla acustica basUaris. 

 Epithelium on raphe. 

 Ramulus basilaris. 

 Ramulus neglectus. 

 Tegmentum vasculosum. 



outwards. The short ram. basilaris passes in from above to supply 

 it. The walls of this dilatation are thick and stiff, with the exception 



Dd 



