-ha. 



Fio. 180 MEMBRANOUS LABYRINTH OF VARIOUS FISHES (after G. Retzius). 

 A, Myxim glutinosa, from the inner side. 



se, saccus communis ; aa, ap, anterior and posterior ampulla.; cc, canalis com- 

 munis ; de, ductus endolymphaticus ; se, sacons endolymphaticus ; me, macula 

 acustica communis ; era, crista acustica of the anterior, and crp, of the 

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

 nerve. 



A 1 , Aeimnser sturio, outer side ; B, Chimcera monttrosa, inner side ; C, Perca 

 Jlumatilis, inner side. 



it, utriculus ; ss, sp, sinus utriculi superior and posterior ; o-vs, apex of the sinus 

 superior ; rec, recessus utriculi ; aa, ae, ap, anterior, external, and posterior 

 ampulla ; eft, cp, ee, anterior, posterior, and horizontal (external) semicircular 

 canals ; ., sacculus ; ens, utriculo-saccular canal ; de, ductus endolymphati- 

 cus, which in B opens externally through the skin ha at ode ; se, saccus 

 endolymphaticus ; /, lagena ; mn, macula acustica of the recessus utriculi ; 

 er, crista acustica of the ampullae ; ms. macula acustica of the sacculus ; mn, 

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

 nerve ; raa, rae, rap, ru, rs, rl, m, the various branches of the same ; o 

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



Q 



