402 



TRE SKIX AND THK SEXSE-( )KGAXS. 



of a small portion, the Vieiiibrana hasUaris (Hasse) {ni(j), which closes 

 the opening- into a small dilatation on the anterior inner wall. The 

 rminlns basilaris (rb) divides into, at least, two branches, and passes 

 close to the memhrana basilaris {mh), where the elongated and 

 oval papilla ac. basilaris (Fig. 250 jojjb) is placed. The papilla 

 is covered by a membrana tectoria (Fig. 25c 7nf), which is often 

 found separated from the papilla, probably b}^ the action of the 



I. 



II. 



III. 



IV. 



Preparations from the ear of liana esculenla ; after Retzius. 



Part of the membranous wall seen from the surface. Vérick, Obj. VI, Oc. 3. 



Transverse section of the membranous wall. Vérick, Obj. Ill, Oc. 3. 



Epithelium from the neighbourhood of the macula ac. rec. utriculi. Vérick, Obj. Ill, Oc. 3. 



Branched cells from the yellow spot on the floor of the anterior ampulla. Vérick, Obj. Ill, 



Oc. 3. 

 Epithelium from the roof of the anterior ampulla. Vérick, Obj. Ill, Oc. 3. 



Epithelium of I'aphe. 

 Pavement epithelium. 



Protoplasmic cells. 

 Perilymphatic tissue. 



reagents used. The form of this membrane is peculiar but will 

 easily be understood from the figure (Fig. 350 mf). In structure 

 it is similar to the corresponding structures found in other parts 

 of the ear. 



(10) The tegmentum vasculosum (Deiters) (Figs. 245, 248, and 

 250 tv) is an oval, shell- shaped dilatation of the membranous laby- 

 rinth ; its long axis is directed from above and in front, downwards 

 and backwards. The walls of the teymeuinm are thin and inti- 

 mately attached to the periosteum. 



e. The minute structure of the membranous labyrinth (Figs. 

 25 ^ 2.52)- 



