THE CHIMPANZEES AND ORANGS. 27 



hypothesis has been more especially set forth in Parts III." and IV.- of the series of com- 

 munications on the Anthropoid Apes. In concluding the present Part I would remark 

 that, whilst the bony frame of the Gorilla shows the nearest approaches, among Apes, 

 to the truly human characteristics of the skeleton, it differs in a greater degree than 

 does that of lower Quadrumana by its adaptive developments. These differences relate 

 to the great bodily strength and power of bite of the Gorilla, and do not approximate it 

 to any lower form, assuredly not to the Baboons with their short and narrow thorax, 

 long and narrow pelvis, long loins with anapophysially interlocked vertebra, and short- 

 spined neck-bones. 



DESCRIPTION OF THE PLATES. 



PLATE I. 



Fig. I. Left scapula, back or outer surface, of an adult but young male Troglodytes 



Gorilla. 

 Fig. 2. Front view of the coracoid process of the same. 

 Fig. 3. The glenoid angle, showing the articular surface {g) and the contiguous acromial 



(«) and coracoid (c) processes of the same scapula. 

 Fig. 4. Left scapula, from the same aspect, of an adult male Troglodytes niger. 

 Fig. 5. Glenoid angle of the same scapula. 

 Fig. 6. Upper costa and acromion process of the same. 

 Fig. 7. Left scapula of an adult male Euiopean. 

 Fig. 8. Glenoid angle of the same scapula. 



PLATE II. 



Fig. 1. Right clavicle of an adult but young male Troglodytes Gorilla. 



Fig. 2. Right clavicle of an adult male European. 



Fig. 3. Right clavicle of an adult male Troglodytes niger. 



Fig. 4. Right clavicle of an adult male Australian. 



Figs. 5, 6. Os scaphoTdes of a Gorilla. 



Figs. 7, 8. Os scaphoi'des of a Man. 



Fig. 9. Os lunare of a Gorilla. 



Fig. 10. Os lunare of a Man. 



Fig. 11. Os pisiforme of a Gorilla. 



Fig. 12. Os pisiforme of a Man. 



Fig. 13. Os cuneiforme of a Gorilla. 



' Trans. Zool. Soc. vol. iii. p. S81. lb. vol. iv. p. 175. 



e2 



