DEVELOPMENT OF THE SACCUS ENDOLYMPHATICUS 249 
*& a 10 
Fig.10 Transverse section of one of the spinal ganglia and calcareous sacs 
shown in fig. 9. c.tf., connective tissue; ca., caleareous matter; g., ganglion cells; 
n.d.m., neural lamella of dura mater; ¢.s.e., tubuli of saccus endolymphaticus; 
v., blood vessels. 
Figure 10 drawn by means of Zeiss Abbe drawing apparatus. Oil immersion 
O,3 mm. comp. oc. 6. 
