TUE FOOT IN THE ANTHROPOMORPHA. 407 



globular. It is evenly convex in the Chimpanzee ; but, in tlie 

 Gorilla, it has the characteristically human saddle shape. The 

 pollex is longest and strongest in proportion in Bylohates ; 

 its length in proportion to that of the manus being in S. syiir- 

 dactylus as three to seven. In the Gorilla, the pollex has 

 rather more than one-third the length of the manus ; in the 

 Orang and Chimpanzee it has about one-third the length of 

 the manus. 



The pelvis differs but little from that of the Gynomorplia 

 in Hylobates. In the other genera the pelvis is still elongated. 

 The antero-posterior diameter of the brim of the pelvis great- 

 ly exceeds the transverse, the tuberosities of the ischia are 

 strongly everted, and the pubic symphysis is very long, the 

 arch being correspondingly reduced ; but the ilia are wider 

 and more concave forward in the Chimpanzee than in the 

 Orang, and in the Gorilla than in either. 



In the female Chimpanzee, which is of about the same size 

 as the male, the dimensions of the basin of the pelvis, and, of 

 its outlets, are greater than in the male, though the general 

 form and absolute length of the pelvis are the same in the two 

 sexes. The female Gorilla is much smaller than the male, and 

 the pelvis is shorter in proportion, but the intersciatic meas- 

 urement of the outlet is absolutely as great as in the male, 

 and the transverse diameter of the brim is nearly as great. 

 As, at the same time, the antero-posterior diameter is much 

 shorter, the brim of the pelvis of the female is much more 

 round. The female Orangs, also, are smaller than the males. 

 The basin of the pelvis is relatively, but not absolutely, larger 

 in all its dimensions, and the brim rounder. 



The femur of the Orang has no round ligament, and differs 

 in this respect from the same bone in the other Anthropomor- 

 pha. The femur of the Gorilla resembles that of Man, most 

 especially in the projection of the articular surface of the inner 

 condyle beyond the outer. 



The length of the whole foot to that of the tarsus is, in 

 Hylobates, as thirty-five to ten, and the proportion is about 

 the same in the Orang ; in the Chimpanzee it is as twenty- 

 four to ten ; and, in the Gorilla, about the same (twenty-three 

 to ten in the specimen measured). 



The hallux has not more than one-fourth of the length of 

 the foot in the Orang ; in the Gorilla less than five-twelfths 

 in the Chimpanzee and in Hylobates a little more. 



In the second digit of the pes of the Orang and the Chim- 

 panzee, the phalanges, taken together, are longer than the 



