nis s 



Fin. 180 — Membranous Labyrinth of Various Fishes (after (i. Retzins). 

 A, Myxine ijlii/ino^a, from the inner side. 



«', sacons commitnis ; aa, ap, anterior and posterior ampulla ; or, canalis com- 

 munis ; de, ductus endolymphaticus ; se, sacous endolymphaticus ; mc, macula 

 aoustica communis ; cm, crista acustica of the anterior, and rr]i, of I he 

 posterior ampulla ; ra, rp, anterior and posterior branches of the auditory 

 nerve. 



A', Acinenxer utitrio, outer side ; B, Chimn'ra monitrosa, inner side ; C, Perra 

 flumatilis, inner side. 



11, utriculus ; .«s, sp, sinus utriculi superior and posterior ; ass, apex of the sinus 

 superior ; n-c, reoessus utriculi ; aa, ae, ap, anterior, external, and posterior 

 ampulla ; ra, rp, re, anterior, posterior, and horizontal (external) semicircular 

 canals ; s, sacciilus ; ens, utriculo-saccular canal ; de, ductus endolymphati- 

 cus, whicli in B opens externally through the skin ha at ade ; He, saccus 

 endolymphaticus ; I, lagena ; mu, macula acustica of the recessus utriculi ; 

 rr, crista acustica of the ampullae ; ms, macula acustica of the sacculus ; iiw, 

 macula acustica neglecta ; pi, papilla acustica of the lagena ; ar, auditory 

 nerve ; raxi, rae, rap, rti, r,i, rl, rn, the various branches of the same ; o 

 (in C), otoliths (in the recessus utriculi, sacculus, and lagena.) 



Q 



