188 ANTHROPOID APES. 



in the orang this division is not very clearly marked. 

 I have not myself observed a subdivision of these 

 lobes, occurring on their edges, which is mentioned 

 by Bolau and Auzoux in the case of the gorilla. 

 Bischoff notices in the gorilla the absence of the 

 H-shaped arrangement of the fissures on the under 

 surface of the liver, so noticeable in man ; and the 

 same remark applies to other species of anthropoids. 

 Moreover, the fissures on this part of the liver are 

 not incised on the substance with the same uniform 

 depth. The gall-bladder of the gorilla and the 

 orang is not remarkable for its size ; in the chim- 

 panzee 1 found that this organ is large and twisted, 

 and it is also large in the gibbon. 



The spleen is elongated in the gorilla, chim- 

 panzee, and gibbon, shorter and wider in the orang. 

 On its left contour it is uniformly bevelled off. There 

 is nothing in the pancreas which calls for remark. 



I'he larynx of anthropoids possesses on the whole 

 a structure resembling that of man. This is es- 

 pecially the case at the entrance to that organ. 

 The anterior and specially vocal portion of the 

 glottis is short, about as long as the respiratory 

 portion. In the chimpanzee there is a deep cavity 

 in the body of the hyoid bone. In the gorilla, chim- 

 panzee, and orang the throat-pouches or air-sacs 

 correspond to Morgagni's sacs. These are the thin- 

 skinned elastic sacs, closely united with their sur- 

 roundings by connective tissue. The right laryngeal 

 sac appears to be of larger diameter than the left. 

 According to Duvernoy's and Ehlers' accurate ac- 

 count only the upper portion of this organ occurs 



