THE CHIMPANZEES AND ORANGS. 115 



PLATE XXXV. 



Lumbar Vertebrae. 



Fig. 1 . The four lumbar vertebree of the Gorilla. 



Fig. 2. The five lumbar vertebrae of a Negro. 



Fig. 3. Side view of the second lumbar vertebra of the Gorilla. 



Fig. 4. Upper view of the second lumbar vertebra of ditto. 



Fig. 5. Side and upper views of the third lumbar vertebra of a Negro. 



Fig. 6. Upper view of the first lumbar vertebra of the Chimpanzee {Troglodytes niger). 



PLATE XXXVL 



The Sacrum. 



Fig. 1. The sacrum of the Gorilla. 



Fig. 2. Upper view of the same sacrum. 



Fig. 3. The sacrum and coccyx of the Chimpanzee. 



Fig. 4. Upper view of the same sacrum. 



Fig. 5. The sacrum of an adult male Australian. 



Fig. 6. Upper view of the same sacrum. 



Fig. 7. The sacrum and coccyx of a Frenchman. 



Fig. 8. Upper view of the same sacrum. 



The initial letters of the vertebral elements and processes are the same for each 

 figure, and are explained in the text. 



s2 



