on Troglodytes Niger. 



37 



o 



remarks, " the spines are simple and elongated, not short and 

 bifurcated as in the human subject; that of the third vertebrae 

 is the shortest with the exception of the atlas, where, as is 

 usually the case, the spine is wanting." In the present case 

 the atlas had been accidentally lost, but of the six remaining 

 cervical vertebrae tbe spinous process of the dentatus or second 

 was the shortest, and the extremity of which was distinctly 

 bifurcated; those of the remaining vertebrae increased regu- 

 larly in length and strength, from the third to the seventh, as 

 will be seen from the following measurements taken from the 

 inside of the spinal canal to the tip of the process. 



Cervical vertebrae. 



(Length of spinous process of the 



2. 

 06 



3. 

 O.Si 



6. 



0.9^ 0.9i 



6. 



10 



' M 



The body of the 7th does not differ from the 2d so 

 much in its transverse diameter as in man, in the Chimpanzee 

 there being only a difference of 0.2| of an inch, whereas in 

 man it amounts to 0.4 of an inch. As is often the case with 

 man the 7th presents only a notch instead of a foramen for 

 the passage of the vertebral artery, a short spine projecting 

 in front of the latter from either side. 



The dorsal vertebrae are thirteen, and the lumbar only four 

 in number, the latter being proportionally smaller than in man, 

 "where they are enlarged to afford a basis of support to the 

 column above in reference to his erect position." The com- 

 parative size and strength, of different portions of the vertebral 

 column in man, and the Chimpanzee, are sufficiently well 

 shown by the following table of admeasurements. 



