THE TRIUMPH OF LITE 



ment has been absolutely turned upside down. 

 The vertebrates reached the height of their de- 

 velopment by the construction throughout the 

 length of their bodies, dorsal to their stomach, 

 of a long channel in which all nerves are united, 

 and where all tlie high central stages were knot- 

 ted together and where the final sensations all 

 led to the foremost portion, the brain. This 

 form has arisen slowly from the river lamprey 

 beneath, and reaches its triumph in the man, 

 who, when I pinch any portion of his whole 

 body, will at once sound an alarm up above in 

 the skull capsule and set in motion the necessary 

 protective activities. With the atlantosaur, 

 however, the brain up ahead is utterly incapable 

 of use as a central station for guiding the land 

 transportation of a body weighing sixty thou 

 sand pounds; consequently it is necessary to 

 have a main central station in the vicinity of the 

 body. Here where the spinal marrow increases 

 to three-fold and, indeed, in some forms to ten- 

 fold the thickness of the brain, there is formed 

 a "tail brain," and this not simply as an assist- 

 ant, but as an independent central station. The 

 whole "thought" that controlled the movement, 

 of this wandering Heidelburg casque was per- 

 formed in this rear spinal ganglia, while the true 

 brain had perhaps no further purpose assigned 

 to it than to function as a seeing, hearing and 

 smelling apparatus, which in the tiny head of 

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