ORANG QUTANG. 



35 



The situation and communications of the third 

 and fourth ventricles, the appearance of the crura 

 cerebri and corpora albicantia, resemble the same 

 organs in the human subject ; but the pons Varolii 

 is rather more flat. The cerebellum, as we have 

 said, bears rather a larger proportion to the cere- 

 brum than in man. It shews, when laid open, a very 

 perfect arbor vitae. The whole quantity of brain 

 in this animal is considerable, weighing 11 ounces 

 avoirdupois*. Unfortunately, the body was not 

 weighed before dissection, so that 1 am unable to 

 state the proportion between it and the brain ; but 

 conjecture that the latter is from #oth to ^oth part 

 of the whole body. This proportion approaches 

 pretty nearly to that of man, in whom it varies 

 from 22 to s\ f . The quantity of brain, however, 

 gives no indication of the intellect of animals, else 

 monkeys, the mole, the mouse, the dolphin, and 

 several birds, should be greatly superior to the dog, 

 the horse and the elephant, which last of all qua- 



c 2 



* The brain in Tyson's animal weighed 11 oz. 7 drachms ; 

 but the animals dissected by the Parisian anatomists must 

 have been small monkeys ; for the brain, though " large in 

 proportion to the body/' is stated only to weigh %\ oz. 



t See Cuvier, Anatomie Comparee, torn. ii. p. 149. 



