adc 



lia. 



AT- 



ms 



FIG. 216. MEMBRAIS T OUS LABYRINTH OF VARIOUS FISHES. (After G. Retzius.) 

 A, Myxine ghitinosa, from the inner side. 



aa, ap, anterior and posterior ampulla ; cc, canalis communis ; de, ductus endo- 

 lymphaticus ; era, crista acustica of the anterior, and crp, of the posterior 

 ampulla ; me, macula acustica communis ; ra, rp, anterior and posterior 

 branches of the auditory nerve ; sc, saccus communis ; se, saccus endolym- 

 phaticus. 



A 1 , Acipenser sturio, from the outer side ; B, Chimcera monstrosa, from the inner 

 side ; C, Perca fluviatilis, from the inner side. 



aa, ae, ap, anterior, external, and posterior ampulla ; ac, auditory nerve ; .*<?, 

 apex of the sinus superior ; ca, ce, cp, anterior, external (horizontal) and 

 posterior semicircular canals ; cr, crista acustica of the ampullae ; cti*, 

 utriculo-saccular canal ; de, ductus endolymphaticus, which in B opens 

 externally through the skin ha at ade ; /, lagena (cochlea) ; mn, macula 

 acustica neglecta ; ms, macula acustica of the sacculus ; mu, macula acustica 

 of the recessus utriculi ; o (in C), otoliths in the recessus utriculi, sacculus, 

 and lagena; pi, papilla acustica of the lagena; raa, rae, raj}, ru, rs, rf, rn, 

 the various branches of the auditory nerve ; rec, recessus utriculi ; s, sac- 

 culus ; se, saccus endolymphaticijs ; $, ,^w, sinus utriculi superior and 

 posterior ; u, utriculis, 



