320 JOURNAL OF COMPARATIVE NEUROLOGY. 
Fig. 17. Brain of four days rat, cortical cell layer. 
(a) large dividing cell of 2nd class. 
Fig. 18. Cervical cord of new-born rat, anterior gray column. 
(a) multipolar cell with nucleus in prophase. 
Fig. 19. Thoracic cord of new-born rat, anterior gray column. 
(a) multipolar cell with nucleus in prophase. 
Fig. 20. Lumbar cord of new-born rat, anterior gray column. 
(a) multipolar cell with nucleus in prophase. 
