394 DEVELOPMENT OF ORGANS IN MAMMALIA. [CHAP. 

 FIG. 131. 





JOT 



J3TJB 



SECTION THROUGH THE INTERNAL EAR OF AN EMBRYONIC 

 SHEEP 28 MM. IN LENGTH. (After Bottcher.) 



D.M. dura mater; R. V. recessus labyrinthi ; H.V.B. posterior 

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



