190 ANTHROPOID APES. 



cation on the right side, situated above the artery. 

 Huxley and Ehlers hohl that the lungs of a gorilla 

 are cleft like those of the human organism, the 

 right divided into three, and the left into two 

 lobes. I have myself observed this type, and 

 in one instance I found three lobes on the left. 

 In the chimpanzee I saw that the right lung was 

 divided into three, and the left into two lobes. 

 Bischoff observed an instance of a chimpanzee 

 which had four lobes on the right and two on the 

 left side. In an orang dissected by me I found 

 only one lobe on each side, with thin, slightly 

 indented notches on the anterior edges of the right 

 lobe, and two on the left, and there was at the same 

 time a strongly marked, indentation between the 

 lobes. The lungs of a gibbon are described as 

 having four lobes on the right, and only one or two 

 on the left. I myself have examined a gibbon in 

 which there were three lobes on the right, and two 

 on the left. It appears that there are not unim- 

 portant individual variations of this structure in 

 every species of anthropoids ; and indeed, human 

 lungs are by no means exempt from them. 



The male sexual organs correspond on the whole 

 with the form and arrangement of these organs in 

 man. I must not omit to mention that the penis 

 of the swine-snouted baboon, and of other dog- 

 headed apes, is much more like the penis in man 

 than is the case with anthropoids, with the excep- 

 tion of the gorilla. In the last-named animal the 

 scrotifm is short and tightly stretched. The right 

 testicle is a little higher than the left, and is divided 



