THE EAR, 



and rounded, lying in a shallow depression in the head of the 

 inner pillar, thus resembling a ball and socket-joint (Fig. 163, 

 gia}. The heads of the pillars, when seen from the surface, have 





Fio. 1(53. Section through the dnctna cochlearis of a young dog : K-r', Reissner's membrane ; Los 

 and Los', vestibnlar and tympanic platen of the osseous lamina ; asp, ganglion spiritl* 1 ; n, fine nervee 

 pawing through the habenula perforata at Jfn ; Cr, crista spiralia ; Lr, its vestibuln or upper lip ; 

 rm, Mt, m', the membrana tectoria (Corti's membrane); 8*tH, recessim internns clothed with epil he- 

 lium ; fl and /a, inner and outer pillarx of Corti , a and n", a", a", inner and outer liair-oells. between 

 the latter arc seen the fl.ink-Hhaped cells, r, r, r ; Tn. nerve passing through the tunnel to reach one of 

 the outer lmir-cell : J/t. Hennon's prop-cells : ST>, Zt/ zona pectinata ; gta, inner and outer heads of the 

 pillars of Corti : A'/', plate called plialynx. which, when joined with its neighbors, forms the lamina n-ti- 

 cularis, in which the ends of the hair-oella are supported ; Li>p, ligamentum spirale ; <!>'t), stria voacu- 

 laris. AfUT Lax-dowsky. 



