lat qroove c sc.post. absorptfoci 



endolymph. v<? J f;b c.Sc.sup. .- 



>^b. : '. ^^^ ~^^^L. 



lat.groove 



^^ 

 1. 6.6 mm lateral. 



* 



ab'sorp. 

 focus 



d. 13 mm lateral 



o. ii mm. lateral 



6. zomm ;ateral. 



f. aomrn lateral 



PIG. 385. Six stages in the development of the internal car (Streeter). X 25. The 

 figures shov lateral views of models of the left membranous labyrinth a at 6.6 mm.; b, at o 

 mm. ; c at 1 1 mm. ; d at 13 mm. ; e at 20 mm. ; and / at 30 mm. The colors yellow and red are 

 used to indicate respectively the cochlear and vestibular divisions of the acoustic nerve and its 

 ganglia, absorp. focus, Area of wall where absorption is complete; crus, cms commune; c.sc.lat., 

 ductus semicircularis lateralis; c.sc.post., ductus semicircularis posterior; c.sc.sup., ductussemi- 

 circularis superior or anterior: cochlea, ductus cochlearis; each, pouch, cochlear anlage; cndolymph., 

 appendix endolymphaticus; xacc., sacculus; sac. endol., sa:cus endolymphat.icus; sinus ut. lat., 

 sinus utriculi lateralis; utric., utriculus. 



