lat.qroove 

 enaolymph.._ vesiib.p. c.scsuR. 



CSC. post. 



ab5orpt, foci 



id. 13 mm latem/ 



e. zomni lateral. 



f.3QTiiiii. lateral. 



Fig. 385. — Six stages in the development of the internal ear (Streeter). X 25. The figures show 

 lateral views of models of the left membranous labyrinth — a at 6.6 mm.; J at 9 nun.; c at 11 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, ahsorp. focus, Area of wall 

 where absorption is complete; cms, crus commune; c. sc. lat., ductus semicircularis lateralis; c. sc. post., 

 ductus semicircularis posterior; v. sc. sup., ductus semicircularis superior or anterior; cochlea, ductus 

 cochlearis; coch. pouch, cochlear anlage; endolymph., appendix endolymphaticus; sacc, sacculus; sac. en- 

 dol., saccus endolymphaticus; sinus ui. lat., sinus utriculi lateralis; utric, utriculus. 



