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C. JUDSON HERllICK 



Fig. 55 Neurone of the nucleus magnocellularis tecti, giving rise to a fiber of 

 the radix mesencephalica trigemini. From the right side of a horizontal section 

 through the tectum mesencephali of an Amblystoma larva of 40 mm. prepared by 

 the method of 'Ramon yCajal. X 225. 



Fig. 56 Five neurones of the nucleus magnocellularis tecti, giving rise to fibers 

 of the radix mesencephalica trigemini. Drawn from the left side of a horizontal 

 section through the tectum of an Amblystoma larva 45 mm. long prepared by the 

 method of Ramon y Cajal. The ependymal surface is at the right, the pial surface 

 at the left, and the caudal end of the section is below. For purposes of orientation 

 the nuclei of the other neurones of the tectum are sketcheil in dotted outlines in 

 part of the figure. X 225. 



