40 



scries are curved. The middle toe is longer than the ręst, vvhile in 

 the Cliimpanzee it barely surpasses tlie second, The concavity of 

 the great toe is turned more tovvardsthe other toes thanin the Chim- 

 jmnzee, (in vvhich that toe is also longer, having always two 2yftalan- 

 ges in addition to the metatarsal bone,) is set more forwards on the 

 internal cuneiform bone, and has its concavity directed more tovvards 

 the sole of the foot. The resemblance to the human foot is conse- 

 ąuently greater i n the Chimpanzee than in the Orang. 



In conclusion Mr. Owen adverted to a fine specimen of the skull 

 of a Pongo in the possession of Mr. Cross, of the Surrey Zoological 

 Gardens, which presents the follovving differences when compared 

 with the skull of the Pongo in the Museum of the College of Sur- 

 geons. 



It is shorter in the antero-posterior diameter, and rises higher at 

 the vertex. The supraorbitary ridges are more prominent; the 

 plane of the orbits is more vertical, and their lateral exceeds their 

 perpendicular diameter. The profile line of the skull is concave 

 betvveen the glabella and incisor teeth, vvhile, in the specimen in the 

 Museum of the College, it is almost a straight line between the šame 

 parts. The symphysis of the javv from the interspace of the mesial 

 incisors to the origin of the genio-hyoidei museles, measures 2-r 

 inches in Mr. Cross's specimen, but equals 34 inches in the Pongo in 

 the College Museum. There is also a remarkable difference in the 

 position of the zygomatic suture. In the Pongo of the College Mu- 

 seum it commences at. the distance of a ąuarter of an inch from the 

 orbitai process of the malar bone, and extends obliquely backvvards 

 to vvithin 1.^ inch of the origin of the zygomatic process of the tem- 

 poral bone. In Mr. Cross's specimen the šame suture commences 

 8 lines from tlie orbitai process of the malar bone, and extends to 

 within 10 lines of the origin of the temporal zygomatic process, so 

 that it is much nearer the middle of the zygoma. 



With these differences, hovvever, there exist the šame form and 

 proportions of the teeth, and the šame peculiarities of the foramina 

 and suturės vvhich distinguish the Orang from the Chimpanzee. So 

 that although the difference in the shape and general contour of the 

 tvvo škulis, is greater than is usually observable in those of other 

 vvild animals, yet Mr. Ovven does not consider them sufRcient to af- 

 ford grounds for a distinction of species. He thinks it, hovvever, 

 probable that they may be indicative of varieties of the Orang in- 

 habiting distinct localities, and remarks that it vvouid be interesting 

 vvith that view to compare the crania of ascertained specimens from 

 Borneo and Sumatra, to vvhich Islands this very remarkable species 

 appears to be confined. 



