450 



TEXT-BOOK OF EMBRYOLOGY, 







a 



FIG. 382. 



FIG. 379. From the neural tube of an embryo rabbit shortly before the closure of the tube, g, Germi- 

 nal or dividing cell; w, peripheral zone, position of the later marginal layer. His. 



FIG. 380. Pig of 5 mm., unflexed. Just after closure of the neural tube. Segment of a vertical 

 section of the lateral wall of the tube, g, Germinal cells; m, beginning of marginal layer; 

 mli, internal limiting membrane; r, radial columns of protoplasm. The resting nuclei lie in 

 the inner or nuclear layer. Hardesty. 



