166 



mining with certainty the exact age of the young Chimpanzee at the 

 Gardens : its present state of dentition corresponds to that which 

 our own species presents during the period of from 2 to 7 years, viz. 

 incisors 4, canines 4, molars 4, all of which belong to the deci- 

 duous series. The deciduous canines appear in the human jaws be- 

 fore the completion of the second year ; and those of the Chimpanzee 

 are certainly the temporary ones, but are protruded by the enlarged 

 germs of the permanent teeth behind them, so as to appear larger 

 than natural. From this circumstance and from the space already 

 existing beyond the deciduous molars, I infer that the appearance 

 of some of the permanent teeth is near at hand ; and we may still 

 see an additional molar protruding in each jaw before the winter is 

 over, if the poor animal should survive that period. 



" ' The human child acquires the corresponding permanent molars 

 at the seventh year ; and from the appearances on the jaws of our 

 Chimpanzee I conclude that its age tallies with that of 5 or 6 years in 

 lis. But analogy will be dangerous ground for an inference as to 

 precise age, since it is by no means improbable that, where the brain 

 is so much less developed, the full use of it may be much earlier ac- 

 quired, such as it is ; and that the shedding of the teeth may take 

 place at a proportionally early period. 



' Believe me, &c. ' Richahd Owen.' 



" I now proceed to the measurements of our male specimen, 

 premising that the operation was a work of no small difficulty in 

 consequence of the restlessness of the animal. Indeed I am notsure 

 now about the height, though I am confirmed in the measurements 

 by Mr. Miller and Fuller. The Chimpanzee would keep drawing up 

 his legs and putting the musculus scansorius detected by Dr. Traill 

 into action ; and it was not practicable to make him stand or lie 

 quite straight with his legs entirely extended. 



Ft. In. 



Height from the heel to the top of the head 2 



Circumference of the bottom of the breast 1 5 



round the hips 1 3^ 



of the head round the eyes and ears . . 13 



Opening of the mouth 3-;- 



Height from the middle of the upper lip to the eyebrows 3-}- 



Length from the eyebrows to the occiput T\ 



Diameter of the ear upwards 2-f 



Transverse diameter of the same I4 



Circumference of the external edge of the same 6 i 



of that part which adheres to the head 4i 



Height from the upper point of the pubis to the clavicle 10 J^ 



Distance between the navel and sternum 4+ 



