394 DEVELOPMENT OF ORGANS IN MAMMALIA. [CHAP. 



Fig. 13L 



ch 



.mm 



TJ 



JIJB 



Section through the Internal Ear of an Embryonic] 

 Sheep 28 mm. in length. (After Bottcher.) 



DJf. dura mater; R.V. recessus labyrinthi ; H.V.B. posterior 

 vertical semicircular canal ; U. utriculus ; H.B. horizontal 



