THE NERVOUS SYSTEM 



253 



y&/./f 



'S.S^r. 



D 



- '/f. 



str 



l'JeJ./7]^o'.) 



W^^ 



,op.L. 



Tr ^ 



# 





B 



^//.if^-' 



Fig. 1.51. — Six transverse sections through the brain of an 8-day chick in 

 the planes represented in Fig. 147. 

 Cbl., Cerebelhim. F. M., Foramen of Monro. Gn. V., Ganghon of the 

 trigeminus. Isth., Isthmus. It. d., Diverticuhmi of the iter. lat. V., 

 Lateral ventricle. Other abbreviations as before (Fig. 147). 



