TO THE LOWER ANIMALS 



259 



thirteen pair of ribs,* but the Gorilla sometimes has 

 fourteen pairs, while an Orang-Utan skeleton in the Museum 



Gitton. 



FIG. 15. Front and side views of the bony pelvis of Man, the Gorilla 

 and Gibbon : reduced from drawings made from nature, of the 

 same absolute length, by Mr. Waterhouse Hawkins. 



* " More than once," says Peter Camper, " have I met with more 

 than six lumbar vertebrae in man. . . Once I found thirteen 



