oh 
DEVELOPMENT OF THE SACCUS ENDOLYMPHATICUS DAT, 
9 
Fig. 8 Transverse section through the head of alarva. (Stage VI.) Hypoph- 
_ysisregion. d.t., point where saccus endolymphaticus divides; g.pr.c., ganglion 
prooticum commune; f.s.e., tubuli of saccus endolymphaticus; v., blood vessel. 
Fig.9 Transverse section through spinal cord and 2 spinal ganglia of a young 
frog. (Stage VII.) g.spin., spinal ganglion; r.d., dorsal root of spinal nerve; 
t.s.e., tubuli of saccus endolymphaticus; v.sp.d., vena spinalis dorsalis duralis; 
z., enlarged as fig. 10. 
