January 27, 1846. 



William Yarrell, Esq., Vice-President, in the Chair. 



A paper by Professor Owen was read, containing the following 

 notes on the dissection of the Chimpanzee {Troglodytes niger) which 

 died in the menagerie of the Society Dec. 29, 1845: — 



Chimpanzee (female) : — Weight 421 Ibs. 



MKASUREMENTS. ft. in. 



From vertex to under-side of heel 3 6 



From vertex to coccyx 2 O 



From trochanter major femoris to extemal condyle of 



femur O Dį 



From extemal condyle of femur to external malleolus . . O 9į 



From heel to end of middle toe O SJ 



From distal end of first metatarsal to distal end of pha- 



langes of first toe O 2^ 



From acromion to external condyle of humerus O 9^ 



From external condyle of humerus to distal end of radius 10 



From distal end of radius to extremity of middle finger . . 10 



Circumference of proximal part of arm O 8 



Circumference of proximal part of forearm O 8A 



Circumference of distal part of fore-arm O 6į 



Circumference of \vrist O 6 



Circumference of proximal part of thigh O 11 



Circumference of distal part of thigh O 9^ 



Circumference of proximal part of leg O 7 



Circumference of distal part of leg O 6{ 



Circumference of metatarsus O 7 



Weight of brain (covered by arachnoid and pia mater), 13 oz. 4 dr. 

 Weight of liver, 2 Ibs. 

 Weight of spleen, 2^ oz. 

 "VVeight of kidneys, 3 oz. each. 



AU the deciduous teeth were shed, and all the permanent teeth 

 (on the right or healthy side of the mouth) were in place, escept the 

 canines and lašt molars ; these latter teeth were more advanced in 

 their development than the canines. This stage of dentition corre- 

 sponds with that of the human subject at about the twelfth year; 

 fcut allowance mušt be made for the later period of development of 

 the canines in the Chimpanzee. Both upper and lower jaws on the 

 left side were enlarged by disease ; the gums inflamed and sloughy : 

 the bicuspides or i^remolars and the first and second true molars had 

 been pushed out, and their fangs more or less absorbed. The left 

 outer permanent incisor of the upper jaw \vas half an inch distant 



