STREETER 



PLATE 4 



C.S.S 



C.S.p. C.S.S 



Cistern a T' 

 'Sea I a tymp. 

 Impressio rotund - \ 



Saccus endol 



C.s.p. 

 Duct, coch 



28 



Scala vestib. 

 Scala tymp. 



Saccus endol 



C.s.s. Scala tymp ; 



C.sp.-V 



Cistern a 



Sacculus 



- Scala vestib. 



Utricuius 



Impressio staped 

 Sacculus 



Ductus coch.- 



C.s.s. 



C.s.p, 



C.s.1. 



-Cisterna 



Impressio rotundr 



Scala tymp. 



He! icotrema 



Scala tymp. 



Scala vestib. 



J. F. Didusch fee. 



